20418618888 has 64 divisors (see below), whose sum is σ = 59703576000. Its totient is φ = 6447983616.

The previous prime is 20418618887. The next prime is 20418618953. The reversal of 20418618888 is 88881681402.

20418618888 is a `hidden beast` number, since 2 + 0 + 4 + 18 + 618 + 8 + 8 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (20418618881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2483545 + ... + 2491752.

It is an arithmetic number, because the mean of its divisors is an integer number (932868375).

Almost surely, 2^20418618888 is an apocalyptic number.

It is an amenable number.

20418618888 is an abundant number, since it is smaller than the sum of its proper divisors (39284957112).

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

20418618888 is a wasteful number, since it uses less digits than its factorization.

20418618888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4975331 (or 4975321 counting only the distinct ones).

The product of its (nonzero) digits is 1572864, while the sum is 54.

The spelling of 20418618888 in words is "twenty billion, four hundred eighteen million, six hundred eighteen thousand, eight hundred eighty-eight".