20757020 has 24 divisors (see below), whose sum is σ = 43696800. Its totient is φ = 8282432.

The previous prime is 20757001. The next prime is 20757031. The reversal of 20757020 is 2075702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9161 + ... + 11199.

It is an arithmetic number, because the mean of its divisors is an integer number (1820700).

Almost surely, 2^20757020 is an apocalyptic number.

20757020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20757020 is an abundant number, since it is smaller than the sum of its proper divisors (22939780).

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

20757020 is a wasteful number, since it uses less digits than its factorization.

20757020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2557 (or 2555 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 23.

The square root of 20757020 is about 4555.9872695169. The cubic root of 20757020 is about 274.8242182416.

The spelling of 20757020 in words is "twenty million, seven hundred fifty-seven thousand, twenty".