20730570 has 32 divisors (see below), whose sum is σ = 56861568. Its totient is φ = 4738368.

The previous prime is 20730569. The next prime is 20730571. The reversal of 20730570 is 7503702.

It is an interprime number because it is at equal distance from previous prime (20730569) and next prime (20730571).

It is a self number, because there is not a number n which added to its sum of digits gives 20730570.

It is not an unprimeable number, because it can be changed into a prime (20730571) 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, 49149 + ... + 49568.

It is an arithmetic number, because the mean of its divisors is an integer number (1776924).

Almost surely, 2^20730570 is an apocalyptic number.

20730570 is an abundant number, since it is smaller than the sum of its proper divisors (36130998).

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

20730570 is a wasteful number, since it uses less digits than its factorization.

20730570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98734.

The product of its (nonzero) digits is 1470, while the sum is 24.

The square root of 20730570 is about 4553.0835705047. The cubic root of 20730570 is about 274.7074354158.

The spelling of 20730570 in words is "twenty million, seven hundred thirty thousand, five hundred seventy".