18693764 has 6 divisors (see below), whose sum is σ = 32714094. Its totient is φ = 9346880.

The previous prime is 18693757. The next prime is 18693791. The reversal of 18693764 is 46739681.

It can be written as a sum of positive squares in only one way, i.e., 17156164 + 1537600 = 4142^2 + 1240^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2336717 + ... + 2336724.

It is an arithmetic number, because the mean of its divisors is an integer number (5452349).

Almost surely, 2^18693764 is an apocalyptic number.

It is an amenable number.

18693764 is a deficient number, since it is larger than the sum of its proper divisors (14020330).

18693764 is a wasteful number, since it uses less digits than its factorization.

18693764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4673445 (or 4673443 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 18693764 is about 4323.6285686909. The cubic root of 18693764 is about 265.3987777986.

The spelling of 18693764 in words is "eighteen million, six hundred ninety-three thousand, seven hundred sixty-four".