20674418688 has 432 divisors, whose sum is σ = 75811324680. Its totient is φ = 5367398400.

The previous prime is 20674418657. The next prime is 20674418707. The reversal of 20674418688 is 88681447602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9933808 + ... + 9935888.

Almost surely, 2^20674418688 is an apocalyptic number.

20674418688 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20674418688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37905662340).

20674418688 is an abundant number, since it is smaller than the sum of its proper divisors (55136905992).

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

20674418688 is a wasteful number, since it uses less digits than its factorization.

20674418688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134 (or 2104 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 54.

The spelling of 20674418688 in words is "twenty billion, six hundred seventy-four million, four hundred eighteen thousand, six hundred eighty-eight".