21232545132 has 12 divisors (see below), whose sum is σ = 49542605336. Its totient is φ = 7077515040.

The previous prime is 21232545121. The next prime is 21232545181. The reversal of 21232545132 is 23154523212.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 21232545132.

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, 884689369 + ... + 884689392.

Almost surely, 2^21232545132 is an apocalyptic number.

It is an amenable number.

21232545132 is an abundant number, since it is smaller than the sum of its proper divisors (28310060204).

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

21232545132 is a wasteful number, since it uses less digits than its factorization.

21232545132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1769378768 (or 1769378766 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

The spelling of 21232545132 in words is "twenty-one billion, two hundred thirty-two million, five hundred forty-five thousand, one hundred thirty-two".