20623643320 has 64 divisors (see below), whose sum is σ = 54114552000. Its totient is φ = 7070958720.

The previous prime is 20623643153. The next prime is 20623643321. The reversal of 20623643320 is 2334632602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20623643321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 737871 + ... + 765310.

It is an arithmetic number, because the mean of its divisors is an integer number (845539875).

Almost surely, 2^20623643320 is an apocalyptic number.

20623643320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20623643320 is an abundant number, since it is smaller than the sum of its proper divisors (33490908680).

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

20623643320 is a wasteful number, since it uses less digits than its factorization.

20623643320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503213 (or 1503195 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 31.

The spelling of 20623643320 in words is "twenty billion, six hundred twenty-three million, six hundred forty-three thousand, three hundred twenty".