20704178976 has 96 divisors (see below), whose sum is σ = 58562175168. Its totient is φ = 6366919680.

The previous prime is 20704178953. The next prime is 20704178983. The reversal of 20704178976 is 67987140702.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2955510 + ... + 2962506.

It is an arithmetic number, because the mean of its divisors is an integer number (610022658).

Almost surely, 2^20704178976 is an apocalyptic number.

20704178976 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20704178976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29281087584).

20704178976 is an abundant number, since it is smaller than the sum of its proper divisors (37857996192).

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

20704178976 is a wasteful number, since it uses less digits than its factorization.

20704178976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9394 (or 9386 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 51.

The spelling of 20704178976 in words is "twenty billion, seven hundred four million, one hundred seventy-eight thousand, nine hundred seventy-six".