19977717948 has 24 divisors (see below), whose sum is σ = 46617298560. Its totient is φ = 6658864560.

The previous prime is 19977717931. The next prime is 19977717961. The reversal of 19977717948 is 84971777991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251043 + ... + 320901.

It is an arithmetic number, because the mean of its divisors is an integer number (1942387440).

Almost surely, 2^19977717948 is an apocalyptic number.

It is an amenable number.

19977717948 is an abundant number, since it is smaller than the sum of its proper divisors (26639580612).

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

19977717948 is a wasteful number, since it uses less digits than its factorization.

19977717948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93697 (or 93695 counting only the distinct ones).

The product of its digits is 56010528, while the sum is 69.

The spelling of 19977717948 in words is "nineteen billion, nine hundred seventy-seven million, seven hundred seventeen thousand, nine hundred forty-eight".