18969435 has 24 divisors (see below), whose sum is σ = 33583680. Its totient is φ = 9900672.

The previous prime is 18969421. The next prime is 18969437. The reversal of 18969435 is 53496981.

It is a happy number.

It is not a de Polignac number, because 18969435 - 2⁵ = 18969403 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (18969437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2370 + ... + 6599.

It is an arithmetic number, because the mean of its divisors is an integer number (1399320).

Almost surely, 2^18969435 is an apocalyptic number.

18969435 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18969435 is a deficient number, since it is larger than the sum of its proper divisors (14614245).

18969435 is a wasteful number, since it uses less digits than its factorization.

18969435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9027 (or 9024 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 18969435 is about 4355.3914864223. The cubic root of 18969435 is about 266.6970008895.

The spelling of 18969435 in words is "eighteen million, nine hundred sixty-nine thousand, four hundred thirty-five".