20019980364 has 24 divisors (see below), whose sum is σ = 47852637168. Its totient is φ = 6510562560.

The previous prime is 20019980347. The next prime is 20019980381. The reversal of 20019980364 is 46308991002.

It is an interprime number because it is at equal distance from previous prime (20019980347) and next prime (20019980381).

It is a super-2 number, since 2×20019980364² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20345017 + ... + 20346000.

It is an arithmetic number, because the mean of its divisors is an integer number (1993859882).

Almost surely, 2^20019980364 is an apocalyptic number.

It is an amenable number.

20019980364 is an abundant number, since it is smaller than the sum of its proper divisors (27832656804).

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

20019980364 is a wasteful number, since it uses less digits than its factorization.

20019980364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40691065 (or 40691063 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The spelling of 20019980364 in words is "twenty billion, nineteen million, nine hundred eighty thousand, three hundred sixty-four".