21232131024 has 40 divisors (see below), whose sum is σ = 59068879072. Its totient is φ = 6532963200.

The previous prime is 21232130951. The next prime is 21232131049. The reversal of 21232131024 is 42013123212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17012302 + ... + 17013549.

Almost surely, 2^21232131024 is an apocalyptic number.

21232131024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21232131024 is an abundant number, since it is smaller than the sum of its proper divisors (37836748048).

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

21232131024 is a wasteful number, since it uses less digits than its factorization.

21232131024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34025875 (or 34025869 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21232131024 its reverse (42013123212), we get a palindrome (63245254236).

The spelling of 21232131024 in words is "twenty-one billion, two hundred thirty-two million, one hundred thirty-one thousand, twenty-four".