20491118384 has 40 divisors (see below), whose sum is σ = 43447518288. Its totient is φ = 9284737280.

The previous prime is 20491118357. The next prime is 20491118387. The reversal of 20491118384 is 48381119402.

It is not an unprimeable number, because it can be changed into a prime (20491118387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127847 + ... + 239430.

Almost surely, 2^20491118384 is an apocalyptic number.

It is an amenable number.

20491118384 is an abundant number, since it is smaller than the sum of its proper divisors (22956399904).

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

20491118384 is a wasteful number, since it uses less digits than its factorization.

20491118384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367613 (or 367607 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The spelling of 20491118384 in words is "twenty billion, four hundred ninety-one million, one hundred eighteen thousand, three hundred eighty-four".