20320700 has 18 divisors (see below), whose sum is σ = 44096136. Its totient is φ = 8128240.

The previous prime is 20320687. The next prime is 20320711. The reversal of 20320700 is 702302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101504 + ... + 101703.

Almost surely, 2^20320700 is an apocalyptic number.

20320700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20320700 is an abundant number, since it is smaller than the sum of its proper divisors (23775436).

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

20320700 is a wasteful number, since it uses less digits than its factorization.

20320700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203221 (or 203214 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 14.

The square root of 20320700 is about 4507.8487108598. The cubic root of 20320700 is about 272.8849314017.

The spelling of 20320700 in words is "twenty million, three hundred twenty thousand, seven hundred".