20330370 has 48 divisors (see below), whose sum is σ = 53085240. Its totient is φ = 5398272.

The previous prime is 20330369. The next prime is 20330371. The reversal of 20330370 is 7303302.

It is an interprime number because it is at equal distance from previous prime (20330369) and next prime (20330371).

It can be written as a sum of positive squares in 4 ways, for example, as 14584761 + 5745609 = 3819^2 + 2397^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20330371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35446 + ... + 36014.

Almost surely, 2^20330370 is an apocalyptic number.

20330370 is an abundant number, since it is smaller than the sum of its proper divisors (32754870).

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

20330370 is a wasteful number, since it uses less digits than its factorization.

20330370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979 (or 976 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 18.

The square root of 20330370 is about 4508.9211569953. The cubic root of 20330370 is about 272.9282104033.

Adding to 20330370 its reverse (7303302), we get a palindrome (27633672).

The spelling of 20330370 in words is "twenty million, three hundred thirty thousand, three hundred seventy".