21400023133 has 8 divisors (see below), whose sum is σ = 22528073600. Its totient is φ = 20272146048.

The previous prime is 21400023131. The next prime is 21400023173. The reversal of 21400023133 is 33132000412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21400023133 - 2¹ = 21400023131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21400023133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21400023131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267085 + ... + 337837.

It is an arithmetic number, because the mean of its divisors is an integer number (2816009200).

Almost surely, 2^21400023133 is an apocalyptic number.

It is an amenable number.

21400023133 is a deficient number, since it is larger than the sum of its proper divisors (1128050467).

21400023133 is a wasteful number, since it uses less digits than its factorization.

21400023133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86691.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21400023133 its reverse (33132000412), we get a palindrome (54532023545).

The spelling of 21400023133 in words is "twenty-one billion, four hundred million, twenty-three thousand, one hundred thirty-three".