18699456 has 84 divisors (see below), whose sum is σ = 52713128. Its totient is φ = 5849088.

The previous prime is 18699449. The next prime is 18699487. The reversal of 18699456 is 65499681.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55320 + ... + 55656.

Almost surely, 2^18699456 is an apocalyptic number.

18699456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18699456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26356564).

18699456 is an abundant number, since it is smaller than the sum of its proper divisors (34013672).

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

18699456 is a wasteful number, since it uses less digits than its factorization.

18699456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 359 counting only the distinct ones).

The product of its digits is 466560, while the sum is 48.

The square root of 18699456 is about 4324.2867619990. The cubic root of 18699456 is about 265.4257118525.

It can be divided in two parts, 1869 and 9456, that added together give a triangular number (11325 = T₁₅₀).

The spelling of 18699456 in words is "eighteen million, six hundred ninety-nine thousand, four hundred fifty-six".