20985132832 has 12 divisors (see below), whose sum is σ = 41314480326. Its totient is φ = 10492566400.

The previous prime is 20985132823. The next prime is 20985132899. The reversal of 20985132832 is 23823158902.

It can be written as a sum of positive squares in only one way, i.e., 17879968656 + 3105164176 = 133716^2 + 55724^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327892669 + ... + 327892732.

Almost surely, 2^20985132832 is an apocalyptic number.

It is an amenable number.

20985132832 is a deficient number, since it is larger than the sum of its proper divisors (20329347494).

20985132832 is an equidigital number, since it uses as much as digits as its factorization.

20985132832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655785411 (or 655785403 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 20985132832 in words is "twenty billion, nine hundred eighty-five million, one hundred thirty-two thousand, eight hundred thirty-two".