18969634 has 16 divisors (see below), whose sum is σ = 29557080. Its totient is φ = 9123840.

The previous prime is 18969583. The next prime is 18969647. The reversal of 18969634 is 43696981.

It can be written as a sum of positive squares in 4 ways, for example, as 15186609 + 3783025 = 3897^2 + 1945^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4402 + ... + 7570.

Almost surely, 2^18969634 is an apocalyptic number.

18969634 is a deficient number, since it is larger than the sum of its proper divisors (10587446).

18969634 is a wasteful number, since it uses less digits than its factorization.

18969634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3285.

The product of its digits is 279936, while the sum is 46.

The square root of 18969634 is about 4355.4143316107. The cubic root of 18969634 is about 266.6979334866.

The spelling of 18969634 in words is "eighteen million, nine hundred sixty-nine thousand, six hundred thirty-four".