20944644654 has 32 divisors (see below), whose sum is σ = 43820676000. Its totient is φ = 6665060864.

The previous prime is 20944644653. The next prime is 20944644703. The reversal of 20944644654 is 45644644902.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20944644653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 660759 + ... + 691730.

It is an arithmetic number, because the mean of its divisors is an integer number (1369396125).

Almost surely, 2^20944644654 is an apocalyptic number.

20944644654 is an abundant number, since it is smaller than the sum of its proper divisors (22876031346).

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

20944644654 is a wasteful number, since it uses less digits than its factorization.

20944644654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352612.

The product of its (nonzero) digits is 3317760, while the sum is 48.

The spelling of 20944644654 in words is "twenty billion, nine hundred forty-four million, six hundred forty-four thousand, six hundred fifty-four".