20909377716 has 24 divisors (see below), whose sum is σ = 51356366880. Its totient is φ = 6602961312.

The previous prime is 20909377691. The next prime is 20909377739. The reversal of 20909377716 is 61777390902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45853671 + ... + 45854126.

It is an arithmetic number, because the mean of its divisors is an integer number (2139848620).

Almost surely, 2^20909377716 is an apocalyptic number.

It is an amenable number.

20909377716 is an abundant number, since it is smaller than the sum of its proper divisors (30446989164).

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

20909377716 is a wasteful number, since it uses less digits than its factorization.

20909377716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91707823 (or 91707821 counting only the distinct ones).

The product of its (nonzero) digits is 1000188, while the sum is 51.

The spelling of 20909377716 in words is "twenty billion, nine hundred nine million, three hundred seventy-seven thousand, seven hundred sixteen".