21075812632 has 32 divisors (see below), whose sum is σ = 45439545600. Its totient is φ = 8977073184.

The previous prime is 21075812629. The next prime is 21075812671. The reversal of 21075812632 is 23621857012.

It is a junction number, because it is equal to n+sod(n) for n = 21075812591 and 21075812600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1145332 + ... + 1163587.

It is an arithmetic number, because the mean of its divisors is an integer number (1419985800).

Almost surely, 2^21075812632 is an apocalyptic number.

It is an amenable number.

21075812632 is an abundant number, since it is smaller than the sum of its proper divisors (24363732968).

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

21075812632 is a wasteful number, since it uses less digits than its factorization.

21075812632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2309095 (or 2309091 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 21075812632 in words is "twenty-one billion, seventy-five million, eight hundred twelve thousand, six hundred thirty-two".