21142210432 has 32 divisors (see below), whose sum is σ = 48136284720. Its totient is φ = 9060946944.

The previous prime is 21142210417. The next prime is 21142210447. The reversal of 21142210432 is 23401224112.

It is an interprime number because it is at equal distance from previous prime (21142210417) and next prime (21142210447).

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11797213 + ... + 11799004.

Almost surely, 2^21142210432 is an apocalyptic number.

It is an amenable number.

21142210432 is an abundant number, since it is smaller than the sum of its proper divisors (26994074288).

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

21142210432 is an equidigital number, since it uses as much as digits as its factorization.

21142210432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23596238 (or 23596226 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21142210432 its reverse (23401224112), we get a palindrome (44543434544).

The spelling of 21142210432 in words is "twenty-one billion, one hundred forty-two million, two hundred ten thousand, four hundred thirty-two".