20375457 has 4 divisors (see below), whose sum is σ = 27167280. Its totient is φ = 13583636.

The previous prime is 20375449. The next prime is 20375461. The reversal of 20375457 is 75457302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20375457 - 2³ = 20375449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20375417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3395907 + ... + 3395912.

It is an arithmetic number, because the mean of its divisors is an integer number (6791820).

Almost surely, 2^20375457 is an apocalyptic number.

It is an amenable number.

20375457 is a deficient number, since it is larger than the sum of its proper divisors (6791823).

20375457 is an equidigital number, since it uses as much as digits as its factorization.

20375457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6791822.

The product of its (nonzero) digits is 29400, while the sum is 33.

The square root of 20375457 is about 4513.9181428112. The cubic root of 20375457 is about 273.1298205839.

The spelling of 20375457 in words is "twenty million, three hundred seventy-five thousand, four hundred fifty-seven".