18642920801 has 4 divisors (see below), whose sum is σ = 18659119104. Its totient is φ = 18626722500.

The previous prime is 18642920767. The next prime is 18642920843. The reversal of 18642920801 is 10802924681.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10802924681 = 1811 ⋅5965171.

It is a cyclic number.

It is not a de Polignac number, because 18642920801 - 2³⁴ = 1463051617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18642220801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8097425 + ... + 8099726.

It is an arithmetic number, because the mean of its divisors is an integer number (4664779776).

Almost surely, 2^18642920801 is an apocalyptic number.

It is an amenable number.

18642920801 is a deficient number, since it is larger than the sum of its proper divisors (16198303).

18642920801 is a wasteful number, since it uses less digits than its factorization.

18642920801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16198302.

The product of its (nonzero) digits is 55296, while the sum is 41.

The spelling of 18642920801 in words is "eighteen billion, six hundred forty-two million, nine hundred twenty thousand, eight hundred one".