18969768 has 64 divisors (see below), whose sum is σ = 54412800. Its totient is φ = 6117120.

The previous prime is 18969767. The next prime is 18969781. The reversal of 18969768 is 86796981.

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

It is not an unprimeable number, because it can be changed into a prime (18969767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5280 + ... + 8112.

It is an arithmetic number, because the mean of its divisors is an integer number (850200).

Almost surely, 2^18969768 is an apocalyptic number.

18969768 is a gapful number since it is divisible by the number (18) 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 18969768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27206400).

18969768 is an abundant number, since it is smaller than the sum of its proper divisors (35443032).

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

18969768 is a wasteful number, since it uses less digits than its factorization.

18969768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2879 (or 2869 counting only the distinct ones).

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

The square root of 18969768 is about 4355.4297147354. The cubic root of 18969768 is about 266.6985614628.

It can be divided in two parts, 1896 and 9768, that added together give a square (11664 = 108²).

The spelling of 18969768 in words is "eighteen million, nine hundred sixty-nine thousand, seven hundred sixty-eight".