18772881650334 has 48 divisors (see below), whose sum is σ = 49219656097248. Its totient is φ = 5048169854976.

The previous prime is 18772881650311. The next prime is 18772881650353. The reversal of 18772881650334 is 43305618827781.

It is a happy number.

18772881650334 is a `hidden beast` number, since 1 + 8 + 7 + 7 + 2 + 88 + 16 + 503 + 34 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4382089747 + ... + 4382094030.

It is an arithmetic number, because the mean of its divisors is an integer number (1025409502026).

Almost surely, 2^{18772881650334} is an apocalyptic number.

18772881650334 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18772881650334 is an abundant number, since it is smaller than the sum of its proper divisors (30446774446914).

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

18772881650334 is a wasteful number, since it uses less digits than its factorization.

18772881650334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8764183809 (or 8764183806 counting only the distinct ones).

The product of its (nonzero) digits is 54190080, while the sum is 63.

The spelling of 18772881650334 in words is "eighteen trillion, seven hundred seventy-two billion, eight hundred eighty-one million, six hundred fifty thousand, three hundred thirty-four".