18920256701 has 2 divisors, whose sum is σ = 18920256702. Its totient is φ = 18920256700.

The previous prime is 18920256689. The next prime is 18920256731. The reversal of 18920256701 is 10765202981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18629520100 + 290736601 = 136490^2 + 17051^2 .

It is a cyclic number.

It is not a de Polignac number, because 18920256701 - 2⁶ = 18920256637 is a prime.

It is a super-2 number, since 2×18920256701² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18920256731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9460128350 + 9460128351.

It is an arithmetic number, because the mean of its divisors is an integer number (9460128351).

Almost surely, 2^18920256701 is an apocalyptic number.

It is an amenable number.

18920256701 is a deficient number, since it is larger than the sum of its proper divisors (1).

18920256701 is an equidigital number, since it uses as much as digits as its factorization.

18920256701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 41.

The spelling of 18920256701 in words is "eighteen billion, nine hundred twenty million, two hundred fifty-six thousand, seven hundred one".