20602520640 has 896 divisors, whose sum is σ = 82968023040. Its totient is φ = 4777574400.

The previous prime is 20602520633. The next prime is 20602520689. The reversal of 20602520640 is 4602520602.

20602520640 is a `hidden beast` number, since 2 + 0 + 602 + 52 + 0 + 6 + 4 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 212397072 + ... + 212397168.

It is an arithmetic number, because the mean of its divisors is an integer number (92598240).

Almost surely, 2^20602520640 is an apocalyptic number.

20602520640 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 20602520640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41484011520).

20602520640 is an abundant number, since it is smaller than the sum of its proper divisors (62365502400).

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

20602520640 is a wasteful number, since it uses less digits than its factorization.

20602520640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The spelling of 20602520640 in words is "twenty billion, six hundred two million, five hundred twenty thousand, six hundred forty".