20021838364 has 48 divisors (see below), whose sum is σ = 39552226560. Its totient is φ = 8789235840.

The previous prime is 20021838359. The next prime is 20021838371. The reversal of 20021838364 is 46383812002.

It is a super-2 number, since 2×20021838364² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 108937 + ... + 227839.

It is an arithmetic number, because the mean of its divisors is an integer number (824004720).

Almost surely, 2^20021838364 is an apocalyptic number.

It is an amenable number.

20021838364 is a deficient number, since it is larger than the sum of its proper divisors (19530388196).

20021838364 is a wasteful number, since it uses less digits than its factorization.

20021838364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119050 (or 119048 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 20021838364 in words is "twenty billion, twenty-one million, eight hundred thirty-eight thousand, three hundred sixty-four".