20902468608 has 660 divisors, whose sum is σ = 75108605880. Its totient is φ = 5768921088.

The previous prime is 20902468607. The next prime is 20902468663. The reversal of 20902468608 is 80686420902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20902468607) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 150377403 + ... + 150377541.

It is an arithmetic number, because the mean of its divisors is an integer number (113800918).

Almost surely, 2^20902468608 is an apocalyptic number.

20902468608 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 20902468608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37554302940).

20902468608 is an abundant number, since it is smaller than the sum of its proper divisors (54206137272).

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

20902468608 is a wasteful number, since it uses less digits than its factorization.

20902468608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 20902468608 in words is "twenty billion, nine hundred two million, four hundred sixty-eight thousand, six hundred eight".