21500453451132 has 18 divisors (see below), whose sum is σ = 54348368446008. Its totient is φ = 7166817817032.

The previous prime is 21500453451121. The next prime is 21500453451151. The reversal of 21500453451132 is 23115435400512.

21500453451132 is a `hidden beast` number, since 2 + 1 + 5 + 0 + 0 + 4 + 534 + 5 + 113 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×21500453451132² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 597234818087 = 21500453451132 / (2 + 1 + 5 + 0 + 0 + 4 + 5 + 3 + 4 + 5 + 1 + 1 + 3 + 2).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 298617409008 + ... + 298617409079.

It is an arithmetic number, because the mean of its divisors is an integer number (3019353802556).

Almost surely, 2^{21500453451132} is an apocalyptic number.

It is an amenable number.

21500453451132 is an abundant number, since it is smaller than the sum of its proper divisors (32847914994876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21500453451132 is a wasteful number, since it uses less digits than its factorization.

21500453451132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597234818097 (or 597234818092 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 21500453451132 its reverse (23115435400512), we get a palindrome (44615888851644).

The spelling of 21500453451132 in words is "twenty-one trillion, five hundred billion, four hundred fifty-three million, four hundred fifty-one thousand, one hundred thirty-two".