20457650 has 12 divisors (see below), whose sum is σ = 38051322. Its totient is φ = 8183040.

The previous prime is 20457617. The next prime is 20457677. The reversal of 20457650 is 5675402.

It can be written as a sum of positive squares in 3 ways, for example, as 18826921 + 1630729 = 4339^2 + 1277^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 204527 + ... + 204626.

Almost surely, 2^20457650 is an apocalyptic number.

20457650 is a deficient number, since it is larger than the sum of its proper divisors (17593672).

20457650 is a wasteful number, since it uses less digits than its factorization.

20457650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409165 (or 409160 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 20457650 is about 4523.0133760580. The cubic root of 20457650 is about 273.4965892980.

The spelling of 20457650 in words is "twenty million, four hundred fifty-seven thousand, six hundred fifty".