20330970 has 32 divisors (see below), whose sum is σ = 53231040. Its totient is φ = 4928640.

The previous prime is 20330953. The next prime is 20330971. The reversal of 20330970 is 7903302.

It is a super-2 number, since 2×20330970² = 826696682281800, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20330970.

It is not an unprimeable number, because it can be changed into a prime (20330971) 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, 30475 + ... + 31134.

It is an arithmetic number, because the mean of its divisors is an integer number (1663470).

Almost surely, 2^20330970 is an apocalyptic number.

20330970 is an abundant number, since it is smaller than the sum of its proper divisors (32900070).

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

20330970 is a wasteful number, since it uses less digits than its factorization.

20330970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61630.

The product of its (nonzero) digits is 1134, while the sum is 24.

The square root of 20330970 is about 4508.9876912673. The cubic root of 20330970 is about 272.9308953080.

The spelling of 20330970 in words is "twenty million, three hundred thirty thousand, nine hundred seventy".