20598013680 has 160 divisors (see below), whose sum is σ = 64971865344. Its totient is φ = 5397055488.

The previous prime is 20598013679. The next prime is 20598013759. The reversal of 20598013680 is 8631089502.

It is a super-2 number, since 2×20598013680² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7347159 + ... + 7349961.

Almost surely, 2^20598013680 is an apocalyptic number.

20598013680 is a gapful number since it is divisible by the number (20) 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 20598013680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32485932672).

20598013680 is an abundant number, since it is smaller than the sum of its proper divisors (44373851664).

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

20598013680 is a wasteful number, since it uses less digits than its factorization.

20598013680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3343 (or 3337 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The spelling of 20598013680 in words is "twenty billion, five hundred ninety-eight million, thirteen thousand, six hundred eighty".