18810396801 has 75 divisors (see below), whose sum is σ = 32886521393. Its totient is φ = 10714236120.

The previous prime is 18810396749. The next prime is 18810396809. The reversal of 18810396801 is 10869301881.

The square root of 18810396801 is 137151.

It is a perfect power (a square), and thus also a powerful number.

18810396801 is a `hidden beast` number, since 188 + 1 + 0 + 396 + 80 + 1 = 666.

It is not a de Polignac number, because 18810396801 - 2²¹ = 18808299649 is a prime.

It is a super-2 number, since 2×18810396801² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18810396809) by changing a digit.

It is a polite number, since it can be written in 74 ways as a sum of consecutive naturals, for example, 60483436 + ... + 60483746.

Almost surely, 2^18810396801 is an apocalyptic number.

18810396801 is the 137151-st square number.

18810396801 is the 68576-th centered octagonal number.

It is an amenable number.

18810396801 is a deficient number, since it is larger than the sum of its proper divisors (14076124592).

18810396801 is an frugal number, since it uses more digits than its factorization.

18810396801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The spelling of 18810396801 in words is "eighteen billion, eight hundred ten million, three hundred ninety-six thousand, eight hundred one".