18699768 has 32 divisors (see below), whose sum is σ = 51944400. Its totient is φ = 6233184.

The previous prime is 18699761. The next prime is 18699787. The reversal of 18699768 is 86799681.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18699761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43071 + ... + 43502.

Almost surely, 2^18699768 is an apocalyptic number.

18699768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18699768 is an abundant number, since it is smaller than the sum of its proper divisors (33244632).

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

18699768 is a wasteful number, since it uses less digits than its factorization.

18699768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86588 (or 86578 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 18699768 is about 4324.3228371619. The cubic root of 18699768 is about 265.4271880517.

The spelling of 18699768 in words is "eighteen million, six hundred ninety-nine thousand, seven hundred sixty-eight".