20122907976 has 128 divisors (see below), whose sum is σ = 56274960000. Its totient is φ = 6662476800.

The previous prime is 20122907911. The next prime is 20122908011. The reversal of 20122907976 is 67970922102.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33482076 + ... + 33482676.

It is an arithmetic number, because the mean of its divisors is an integer number (439648125).

Almost surely, 2^20122907976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20122907976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28137480000).

20122907976 is an abundant number, since it is smaller than the sum of its proper divisors (36152052024).

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

20122907976 is a wasteful number, since it uses less digits than its factorization.

20122907976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404 (or 1394 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The spelling of 20122907976 in words is "twenty billion, one hundred twenty-two million, nine hundred seven thousand, nine hundred seventy-six".