21303570732 has 24 divisors (see below), whose sum is σ = 50408451072. Its totient is φ = 7001173200.

The previous prime is 21303570721. The next prime is 21303570733. The reversal of 21303570732 is 23707530312.

It is a junction number, because it is equal to n+sod(n) for n = 21303570693 and 21303570702.

It is not an unprimeable number, because it can be changed into a prime (21303570733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12501244 + ... + 12502947.

It is an arithmetic number, because the mean of its divisors is an integer number (2100352128).

Almost surely, 2^21303570732 is an apocalyptic number.

It is an amenable number.

21303570732 is an abundant number, since it is smaller than the sum of its proper divisors (29104880340).

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

21303570732 is a wasteful number, since it uses less digits than its factorization.

21303570732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25004269 (or 25004267 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 33.

The spelling of 21303570732 in words is "twenty-one billion, three hundred three million, five hundred seventy thousand, seven hundred thirty-two".