20944307637 has 24 divisors (see below), whose sum is σ = 34067774208. Its totient is φ = 12284049600.

The previous prime is 20944307617. The next prime is 20944307647. The reversal of 20944307637 is 73670344902.

20944307637 is a `hidden beast` number, since 2 + 0 + 9 + 4 + 4 + 3 + 0 + 7 + 637 = 666.

It is not a de Polignac number, because 20944307637 - 2¹¹ = 20944305589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20944307592 and 20944307601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20944307617) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3409168 + ... + 3415305.

It is an arithmetic number, because the mean of its divisors is an integer number (1419490592).

Almost surely, 2^20944307637 is an apocalyptic number.

It is an amenable number.

20944307637 is a deficient number, since it is larger than the sum of its proper divisors (13123466571).

20944307637 is a wasteful number, since it uses less digits than its factorization.

20944307637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6824521 (or 6824518 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 45.

The spelling of 20944307637 in words is "twenty billion, nine hundred forty-four million, three hundred seven thousand, six hundred thirty-seven".