18920271801 has 8 divisors (see below), whose sum is σ = 26554767520. Its totient is φ = 11949645312.

The previous prime is 18920271793. The next prime is 18920271817. The reversal of 18920271801 is 10817202981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18920271801 - 2³ = 18920271793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18920271801.

It is not an unprimeable number, because it can be changed into a prime (18920271871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165967240 + ... + 165967353.

It is an arithmetic number, because the mean of its divisors is an integer number (3319345940).

Almost surely, 2^18920271801 is an apocalyptic number.

It is an amenable number.

18920271801 is a deficient number, since it is larger than the sum of its proper divisors (7634495719).

18920271801 is a wasteful number, since it uses less digits than its factorization.

18920271801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331934615.

The product of its (nonzero) digits is 16128, while the sum is 39.

It can be divided in two parts, 189202 and 71801, that added together give a triangular number (261003 = T₇₂₂).

The spelling of 18920271801 in words is "eighteen billion, nine hundred twenty million, two hundred seventy-one thousand, eight hundred one".