20977539348 has 12 divisors (see below), whose sum is σ = 48947591840. Its totient is φ = 6992513112.

The previous prime is 20977539313. The next prime is 20977539409. The reversal of 20977539348 is 84393577902.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 874064128 + ... + 874064151.

Almost surely, 2^20977539348 is an apocalyptic number.

It is an amenable number.

20977539348 is an abundant number, since it is smaller than the sum of its proper divisors (27970052492).

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

20977539348 is a wasteful number, since it uses less digits than its factorization.

20977539348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748128286 (or 1748128284 counting only the distinct ones).

The product of its (nonzero) digits is 11430720, while the sum is 57.

The spelling of 20977539348 in words is "twenty billion, nine hundred seventy-seven million, five hundred thirty-nine thousand, three hundred forty-eight".