20698080 has 192 divisors, whose sum is σ = 73156608. Its totient is φ = 4884480.

The previous prime is 20698063. The next prime is 20698081. The reversal of 20698080 is 8089602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20698081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 193387 + ... + 193493.

It is an arithmetic number, because the mean of its divisors is an integer number (381024).

Almost surely, 2^20698080 is an apocalyptic number.

20698080 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 20698080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36578304).

20698080 is an abundant number, since it is smaller than the sum of its proper divisors (52458528).

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

20698080 is a wasteful number, since it uses less digits than its factorization.

20698080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 20698080 is about 4549.5142597864. The cubic root of 20698080 is about 274.5638485722.

The spelling of 20698080 in words is "twenty million, six hundred ninety-eight thousand, eighty".