20257074 has 32 divisors (see below), whose sum is σ = 46471680. Its totient is φ = 6534000.

The previous prime is 20257073. The next prime is 20257079. The reversal of 20257074 is 47075202.

20257074 is a `hidden beast` number, since 20 + 2 + 570 + 74 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20257073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4377 + ... + 7724.

It is an arithmetic number, because the mean of its divisors is an integer number (1452240).

Almost surely, 2^20257074 is an apocalyptic number.

20257074 is an abundant number, since it is smaller than the sum of its proper divisors (26214606).

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

20257074 is a wasteful number, since it uses less digits than its factorization.

20257074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12143 (or 12137 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 20257074 is about 4500.7859313680. The cubic root of 20257074 is about 272.5998242694.

The spelling of 20257074 in words is "twenty million, two hundred fifty-seven thousand, seventy-four".