18386161772 has 12 divisors (see below), whose sum is σ = 35100854376. Its totient is φ = 8357346240.

The previous prime is 18386161711. The next prime is 18386161777. The reversal of 18386161772 is 27716168381.

It is a super-3 number, since 3×18386161772³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18386161772.

It is not an unprimeable number, because it can be changed into a prime (18386161777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208933613 + ... + 208933700.

It is an arithmetic number, because the mean of its divisors is an integer number (2925071198).

Almost surely, 2^18386161772 is an apocalyptic number.

It is an amenable number.

18386161772 is a deficient number, since it is larger than the sum of its proper divisors (16714692604).

18386161772 is a wasteful number, since it uses less digits than its factorization.

18386161772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417867328 (or 417867326 counting only the distinct ones).

The product of its digits is 677376, while the sum is 50.

The spelling of 18386161772 in words is "eighteen billion, three hundred eighty-six million, one hundred sixty-one thousand, seven hundred seventy-two".