20121304944 has 120 divisors (see below), whose sum is σ = 56732178432. Its totient is φ = 6142106880.

The previous prime is 20121304913. The next prime is 20121304991. The reversal of 20121304944 is 44940312102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1020459 + ... + 1039989.

Almost surely, 2^20121304944 is an apocalyptic number.

20121304944 is a gapful number since it is divisible by the number (24) 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 20121304944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28366089216).

20121304944 is an abundant number, since it is smaller than the sum of its proper divisors (36610873488).

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

20121304944 is a wasteful number, since it uses less digits than its factorization.

20121304944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19695 (or 19676 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The spelling of 20121304944 in words is "twenty billion, one hundred twenty-one million, three hundred four thousand, nine hundred forty-four".