20275807 has 2 divisors, whose sum is σ = 20275808. Its totient is φ = 20275806.

The previous prime is 20275799. The next prime is 20275817. The reversal of 20275807 is 70857202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20275807 - 2³ = 20275799 is a prime.

It is a super-2 number, since 2×20275807² = 822216699002498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20275817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10137903 + 10137904.

It is an arithmetic number, because the mean of its divisors is an integer number (10137904).

Almost surely, 2^20275807 is an apocalyptic number.

20275807 is a deficient number, since it is larger than the sum of its proper divisors (1).

20275807 is an equidigital number, since it uses as much as digits as its factorization.

20275807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 20275807 is about 4502.8665314442. The cubic root of 20275807 is about 272.6838284907.

The spelling of 20275807 in words is "twenty million, two hundred seventy-five thousand, eight hundred seven".