20112109984 has 24 divisors (see below), whose sum is σ = 40516549920. Its totient is φ = 9822192576.

The previous prime is 20112109973. The next prime is 20112109987. The reversal of 20112109984 is 48990121102.

It is not an unprimeable number, because it can be changed into a prime (20112109987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7306804 + ... + 7309555.

It is an arithmetic number, because the mean of its divisors is an integer number (1688189580).

Almost surely, 2^20112109984 is an apocalyptic number.

It is an amenable number.

20112109984 is an abundant number, since it is smaller than the sum of its proper divisors (20404439936).

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

20112109984 is a wasteful number, since it uses less digits than its factorization.

20112109984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14616412 (or 14616404 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 37.

The spelling of 20112109984 in words is "twenty billion, one hundred twelve million, one hundred nine thousand, nine hundred eighty-four".