20610788320 has 24 divisors (see below), whose sum is σ = 48692987784. Its totient is φ = 8244315264.

The previous prime is 20610788293. The next prime is 20610788329. The reversal of 20610788320 is 2388701602.

It is a self number, because there is not a number n which added to its sum of digits gives 20610788320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20610788329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64408554 + ... + 64408873.

It is an arithmetic number, because the mean of its divisors is an integer number (2028874491).

Almost surely, 2^20610788320 is an apocalyptic number.

20610788320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20610788320 is an abundant number, since it is smaller than the sum of its proper divisors (28082199464).

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

20610788320 is a wasteful number, since it uses less digits than its factorization.

20610788320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128817442 (or 128817434 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The spelling of 20610788320 in words is "twenty billion, six hundred ten million, seven hundred eighty-eight thousand, three hundred twenty".