18777934383 has 16 divisors (see below), whose sum is σ = 26982162816. Its totient is φ = 11547519840.

The previous prime is 18777934381. The next prime is 18777934387. The reversal of 18777934383 is 38343977781.

It is not a de Polignac number, because 18777934383 - 2¹ = 18777934381 is a prime.

It is a super-2 number, since 2×18777934383² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18777934381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113053 + ... + 224358.

It is an arithmetic number, because the mean of its divisors is an integer number (1686385176).

Almost surely, 2^18777934383 is an apocalyptic number.

18777934383 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18777934383 is a deficient number, since it is larger than the sum of its proper divisors (8204228433).

18777934383 is a wasteful number, since it uses less digits than its factorization.

18777934383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338854.

The product of its digits is 21337344, while the sum is 60.

The spelling of 18777934383 in words is "eighteen billion, seven hundred seventy-seven million, nine hundred thirty-four thousand, three hundred eighty-three".