21252343032 has 64 divisors (see below), whose sum is σ = 59046372000. Its totient is φ = 7082664192.

The previous prime is 21252343027. The next prime is 21252343039. The reversal of 21252343032 is 23034325212.

21252343032 is a `hidden beast` number, since 2 + 125 + 234 + 303 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 21252342987 and 21252343005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21252343039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1793158 + ... + 1804970.

Almost surely, 2^21252343032 is an apocalyptic number.

It is an amenable number.

21252343032 is an abundant number, since it is smaller than the sum of its proper divisors (37794028968).

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

21252343032 is a wasteful number, since it uses less digits than its factorization.

21252343032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20157 (or 20147 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 21252343032 its reverse (23034325212), we get a palindrome (44286668244).

The spelling of 21252343032 in words is "twenty-one billion, two hundred fifty-two million, three hundred forty-three thousand, thirty-two".