18764677812 has 24 divisors (see below), whose sum is σ = 43803831456. Its totient is φ = 6252095008.

The previous prime is 18764677807. The next prime is 18764677819. The reversal of 18764677812 is 21877646781.

It is a super-2 number, since 2×18764677812² (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 (18764677819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321663 + ... + 375494.

It is an arithmetic number, because the mean of its divisors is an integer number (1825159644).

Almost surely, 2^18764677812 is an apocalyptic number.

18764677812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18764677812 is an abundant number, since it is smaller than the sum of its proper divisors (25039153644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18764677812 is a wasteful number, since it uses less digits than its factorization.

18764677812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699407 (or 699405 counting only the distinct ones).

The product of its digits is 6322176, while the sum is 57.

The spelling of 18764677812 in words is "eighteen billion, seven hundred sixty-four million, six hundred seventy-seven thousand, eight hundred twelve".