20227957 has 2 divisors, whose sum is σ = 20227958. Its totient is φ = 20227956.

The previous prime is 20227919. The next prime is 20227969. The reversal of 20227957 is 75972202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19766916 + 461041 = 4446^2 + 679^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20227957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20227997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10113978 + 10113979.

It is an arithmetic number, because the mean of its divisors is an integer number (10113979).

Almost surely, 2^20227957 is an apocalyptic number.

It is an amenable number.

20227957 is a deficient number, since it is larger than the sum of its proper divisors (1).

20227957 is an equidigital number, since it uses as much as digits as its factorization.

20227957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 20227957 is about 4497.5501108937. The cubic root of 20227957 is about 272.4691523031.

The spelling of 20227957 in words is "twenty million, two hundred twenty-seven thousand, nine hundred fifty-seven".