20157610001 has 2 divisors, whose sum is σ = 20157610002. Its totient is φ = 20157610000.

The previous prime is 20157609959. The next prime is 20157610009. The reversal of 20157610001 is 10001675102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17801963776 + 2355646225 = 133424^2 + 48535^2 .

It is a cyclic number.

It is not a de Polignac number, because 20157610001 - 2¹⁸ = 20157347857 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20157610009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10078805000 + 10078805001.

It is an arithmetic number, because the mean of its divisors is an integer number (10078805001).

Almost surely, 2^20157610001 is an apocalyptic number.

It is an amenable number.

20157610001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20157610001 is an equidigital number, since it uses as much as digits as its factorization.

20157610001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 23.

The spelling of 20157610001 in words is "twenty billion, one hundred fifty-seven million, six hundred ten thousand, one".