20402704608 has 192 divisors, whose sum is σ = 63631008000. Its totient is φ = 5642588160.

The previous prime is 20402704603. The next prime is 20402704639. The reversal of 20402704608 is 80640720402.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402704601) 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, 1213443 + ... + 1230141.

It is an arithmetic number, because the mean of its divisors is an integer number (331411500).

Almost surely, 2^20402704608 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 20402704608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31815504000).

20402704608 is an abundant number, since it is smaller than the sum of its proper divisors (43228303392).

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

20402704608 is a wasteful number, since it uses less digits than its factorization.

20402704608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16825 (or 16817 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The spelling of 20402704608 in words is "twenty billion, four hundred two million, seven hundred four thousand, six hundred eight".