20981028752 has 20 divisors (see below), whose sum is σ = 40695590256. Its totient is φ = 10478940960.

The previous prime is 20981028727. The next prime is 20981028781. The reversal of 20981028752 is 25782018902.

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, 708374 + ... + 737397.

Almost surely, 2^20981028752 is an apocalyptic number.

It is an amenable number.

20981028752 is a deficient number, since it is larger than the sum of its proper divisors (19714561504).

20981028752 is a wasteful number, since it uses less digits than its factorization.

20981028752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446686 (or 1446680 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 44.

The spelling of 20981028752 in words is "twenty billion, nine hundred eighty-one million, twenty-eight thousand, seven hundred fifty-two".