20801002608 has 160 divisors (see below), whose sum is σ = 61994246400. Its totient is φ = 6669782784.

The previous prime is 20801002603. The next prime is 20801002627. The reversal of 20801002608 is 80620010802.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20801002601) 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, 3542491 + ... + 3548357.

It is an arithmetic number, because the mean of its divisors is an integer number (387464040).

Almost surely, 2^20801002608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20801002608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30997123200).

20801002608 is an abundant number, since it is smaller than the sum of its proper divisors (41193243792).

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

20801002608 is a wasteful number, since it uses less digits than its factorization.

20801002608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6196 (or 6184 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The spelling of 20801002608 in words is "twenty billion, eight hundred one million, two thousand, six hundred eight".