20310730 has 32 divisors (see below), whose sum is σ = 41264640. Its totient is φ = 7129920.

The previous prime is 20310709. The next prime is 20310737. The reversal of 20310730 is 3701302.

It is not an unprimeable number, because it can be changed into a prime (20310737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7 + ... + 6373.

It is an arithmetic number, because the mean of its divisors is an integer number (1289520).

Almost surely, 2^20310730 is an apocalyptic number.

20310730 is an abundant number, since it is smaller than the sum of its proper divisors (20953910).

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

20310730 is a wasteful number, since it uses less digits than its factorization.

20310730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6414.

The product of its (nonzero) digits is 126, while the sum is 16.

The square root of 20310730 is about 4506.7427261826. The cubic root of 20310730 is about 272.8402953437.

The spelling of 20310730 in words is "twenty million, three hundred ten thousand, seven hundred thirty".