21436931432 has 16 divisors (see below), whose sum is σ = 45936281760. Its totient is φ = 9187256304.

The previous prime is 21436931363. The next prime is 21436931479. The reversal of 21436931432 is 23413963412.

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, 191401118 + ... + 191401229.

It is an arithmetic number, because the mean of its divisors is an integer number (2871017610).

Almost surely, 2^21436931432 is an apocalyptic number.

It is an amenable number.

21436931432 is an abundant number, since it is smaller than the sum of its proper divisors (24499350328).

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

21436931432 is a wasteful number, since it uses less digits than its factorization.

21436931432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382802360 (or 382802356 counting only the distinct ones).

The product of its digits is 93312, while the sum is 38.

The spelling of 21436931432 in words is "twenty-one billion, four hundred thirty-six million, nine hundred thirty-one thousand, four hundred thirty-two".