20295881 has 2 divisors, whose sum is σ = 20295882. Its totient is φ = 20295880.

The previous prime is 20295839. The next prime is 20295883. The reversal of 20295881 is 18859202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11833600 + 8462281 = 3440^2 + 2909^2 .

It is a cyclic number.

It is not a de Polignac number, because 20295881 - 2²² = 16101577 is a prime.

It is a super-2 number, since 2×20295881² = 823845571132322, which contains 22 as substring.

Together with 20295883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20295883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10147940 + 10147941.

It is an arithmetic number, because the mean of its divisors is an integer number (10147941).

Almost surely, 2^20295881 is an apocalyptic number.

It is an amenable number.

20295881 is a deficient number, since it is larger than the sum of its proper divisors (1).

20295881 is an equidigital number, since it uses as much as digits as its factorization.

20295881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 20295881 is about 4505.0950045476. The cubic root of 20295881 is about 272.7737887359.

The spelling of 20295881 in words is "twenty million, two hundred ninety-five thousand, eight hundred eighty-one".