18077947823 has 8 divisors (see below), whose sum is σ = 19540936800. Its totient is φ = 16625298528.

The previous prime is 18077947799. The next prime is 18077947831. The reversal of 18077947823 is 32874977081.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 18077947823 - 2¹⁴ = 18077931439 is a prime.

It is a super-2 number, since 2×18077947823² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18077947523) 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, 2581283 + ... + 2588276.

It is an arithmetic number, because the mean of its divisors is an integer number (2442617100).

Almost surely, 2^18077947823 is an apocalyptic number.

18077947823 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18077947823 is a deficient number, since it is larger than the sum of its proper divisors (1462988977).

18077947823 is a wasteful number, since it uses less digits than its factorization.

18077947823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5169841.

The product of its (nonzero) digits is 4741632, while the sum is 56.

The spelling of 18077947823 in words is "eighteen billion, seventy-seven million, nine hundred forty-seven thousand, eight hundred twenty-three".