20875051 has 2 divisors, whose sum is σ = 20875052. Its totient is φ = 20875050.

The previous prime is 20875033. The next prime is 20875061. The reversal of 20875051 is 15057802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20875051 - 2¹¹ = 20873003 is a prime.

It is not a weakly prime, because it can be changed into another prime (20875061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10437525 + 10437526.

It is an arithmetic number, because the mean of its divisors is an integer number (10437526).

Almost surely, 2^20875051 is an apocalyptic number.

20875051 is a deficient number, since it is larger than the sum of its proper divisors (1).

20875051 is an equidigital number, since it uses as much as digits as its factorization.

20875051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 20875051 is about 4568.9223018125. The cubic root of 20875051 is about 275.3441465514.

The spelling of 20875051 in words is "twenty million, eight hundred seventy-five thousand, fifty-one".