20514061957 has 2 divisors, whose sum is σ = 20514061958. Its totient is φ = 20514061956.

The previous prime is 20514061937. The next prime is 20514061973. The reversal of 20514061957 is 75916041502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19822950436 + 691111521 = 140794^2 + 26289^2 .

It is a cyclic number.

It is not a de Polignac number, because 20514061957 - 2⁷ = 20514061829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20514061937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10257030978 + 10257030979.

It is an arithmetic number, because the mean of its divisors is an integer number (10257030979).

Almost surely, 2^20514061957 is an apocalyptic number.

It is an amenable number.

20514061957 is a deficient number, since it is larger than the sum of its proper divisors (1).

20514061957 is an equidigital number, since it uses as much as digits as its factorization.

20514061957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 20514061957 in words is "twenty billion, five hundred fourteen million, sixty-one thousand, nine hundred fifty-seven".