20577981120 has 112 divisors (see below), whose sum is σ = 66255522048. Its totient is φ = 5410155520.

The previous prime is 20577981107. The next prime is 20577981121. The reversal of 20577981120 is 2118977502.

It is not an unprimeable number, because it can be changed into a prime (20577981121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82794 + ... + 219113.

Almost surely, 2^20577981120 is an apocalyptic number.

20577981120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20577981120 is an abundant number, since it is smaller than the sum of its proper divisors (45677540928).

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

20577981120 is a wasteful number, since it uses less digits than its factorization.

20577981120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301998 (or 301988 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 42.

The spelling of 20577981120 in words is "twenty billion, five hundred seventy-seven million, nine hundred eighty-one thousand, one hundred twenty".