21888434532 has 24 divisors (see below), whose sum is σ = 51080814400. Its totient is φ = 7295030496.

The previous prime is 21888434527. The next prime is 21888434591. The reversal of 21888434532 is 23543488812.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55432 + ... + 216447.

Almost surely, 2^21888434532 is an apocalyptic number.

It is an amenable number.

21888434532 is an abundant number, since it is smaller than the sum of its proper divisors (29192379868).

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

21888434532 is a wasteful number, since it uses less digits than its factorization.

21888434532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278595 (or 278593 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 48.

The spelling of 21888434532 in words is "twenty-one billion, eight hundred eighty-eight million, four hundred thirty-four thousand, five hundred thirty-two".