21150023523633 has 32 divisors (see below), whose sum is σ = 32344577925120. Its totient is φ = 13644984122640.

The previous prime is 21150023523589. The next prime is 21150023523653. The reversal of 21150023523633 is 33632532005112.

21150023523633 is a `hidden beast` number, since 2 + 1 + 1 + 50 + 0 + 23 + 523 + 63 + 3 = 666.

It is not a de Polignac number, because 21150023523633 - 2⁶ = 21150023523569 is a prime.

It is a super-2 number, since 2×21150023523633² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21150023523653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81718516 + ... + 81976922.

It is an arithmetic number, because the mean of its divisors is an integer number (1010768060160).

Almost surely, 2^{21150023523633} is an apocalyptic number.

It is an amenable number.

21150023523633 is a deficient number, since it is larger than the sum of its proper divisors (11194554401487).

21150023523633 is a wasteful number, since it uses less digits than its factorization.

21150023523633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356234 (or 356228 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 36.

Adding to 21150023523633 its reverse (33632532005112), we get a palindrome (54782555528745).

The spelling of 21150023523633 in words is "twenty-one trillion, one hundred fifty billion, twenty-three million, five hundred twenty-three thousand, six hundred thirty-three".