20501858053 has 2 divisors, whose sum is σ = 20501858054. Its totient is φ = 20501858052.

The previous prime is 20501857991. The next prime is 20501858077. The reversal of 20501858053 is 35085810502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13972894849 + 6528963204 = 118207^2 + 80802^2 .

It is a cyclic number.

It is not a de Polignac number, because 20501858053 - 2²¹ = 20499760901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20501858953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10250929026 + 10250929027.

It is an arithmetic number, because the mean of its divisors is an integer number (10250929027).

Almost surely, 2^20501858053 is an apocalyptic number.

It is an amenable number.

20501858053 is a deficient number, since it is larger than the sum of its proper divisors (1).

20501858053 is an equidigital number, since it uses as much as digits as its factorization.

20501858053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48000, while the sum is 37.

The spelling of 20501858053 in words is "twenty billion, five hundred one million, eight hundred fifty-eight thousand, fifty-three".