20122631872 has 112 divisors (see below), whose sum is σ = 48099715840. Its totient is φ = 8159450112.

The previous prime is 20122631839. The next prime is 20122631899. The reversal of 20122631872 is 27813622102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

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, 12367123 + ... + 12368749.

Almost surely, 2^20122631872 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 20122631872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24049857920).

20122631872 is an abundant number, since it is smaller than the sum of its proper divisors (27977083968).

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

20122631872 is a wasteful number, since it uses less digits than its factorization.

20122631872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3118 (or 3108 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The spelling of 20122631872 in words is "twenty billion, one hundred twenty-two million, six hundred thirty-one thousand, eight hundred seventy-two".