20445067636 has 12 divisors (see below), whose sum is σ = 40890135328. Its totient is φ = 8762171832.

The previous prime is 20445067613. The next prime is 20445067679. The reversal of 20445067636 is 63676054402.

20445067636 is an admirable number.

It is a super-2 number, since 2×20445067636² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20445067592 and 20445067601.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 365090466 + ... + 365090521.

Almost surely, 2^20445067636 is an apocalyptic number.

It is an amenable number.

20445067636 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20445067636 is a wasteful number, since it uses less digits than its factorization.

20445067636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730180998 (or 730180996 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 43.

The spelling of 20445067636 in words is "twenty billion, four hundred forty-five million, sixty-seven thousand, six hundred thirty-six".