20215683444 has 36 divisors (see below), whose sum is σ = 51847941152. Its totient is φ = 6125964240.

The previous prime is 20215683443. The next prime is 20215683487. The reversal of 20215683444 is 44438651202.

It is a super-2 number, since 2×20215683444² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20215683443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6959872 + ... + 6962775.

Almost surely, 2^20215683444 is an apocalyptic number.

It is an amenable number.

20215683444 is an abundant number, since it is smaller than the sum of its proper divisors (31632257708).

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

20215683444 is a wasteful number, since it uses less digits than its factorization.

20215683444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13922676 (or 13922663 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 39.

The spelling of 20215683444 in words is "twenty billion, two hundred fifteen million, six hundred eighty-three thousand, four hundred forty-four".