21023202232 has 64 divisors (see below), whose sum is σ = 43084800000. Its totient is φ = 9578943360.

The previous prime is 21023202227. The next prime is 21023202253. The reversal of 21023202232 is 23220232012.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1185769 + ... + 1203367.

It is an arithmetic number, because the mean of its divisors is an integer number (673200000).

Almost surely, 2^21023202232 is an apocalyptic number.

It is an amenable number.

21023202232 is an abundant number, since it is smaller than the sum of its proper divisors (22061597768).

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

21023202232 is a wasteful number, since it uses less digits than its factorization.

21023202232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17924 (or 17920 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21023202232 its reverse (23220232012), we get a palindrome (44243434244).

The spelling of 21023202232 in words is "twenty-one billion, twenty-three million, two hundred two thousand, two hundred thirty-two".