20418055644 has 48 divisors (see below), whose sum is σ = 54455337216. Its totient is φ = 5832960000.

The previous prime is 20418055631. The next prime is 20418055661. The reversal of 20418055644 is 44655081402.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1019164 + ... + 1039004.

It is an arithmetic number, because the mean of its divisors is an integer number (1134486192).

Almost surely, 2^20418055644 is an apocalyptic number.

It is an amenable number.

20418055644 is an abundant number, since it is smaller than the sum of its proper divisors (34037281572).

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

20418055644 is a wasteful number, since it uses less digits than its factorization.

20418055644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32106 (or 32104 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 39.

The spelling of 20418055644 in words is "twenty billion, four hundred eighteen million, fifty-five thousand, six hundred forty-four".