18520034 has 24 divisors (see below), whose sum is σ = 30359700. Its totient is φ = 8468928.

The previous prime is 18520031. The next prime is 18520043. The reversal of 18520034 is 43002581.

It can be written as a sum of positive squares in 6 ways, for example, as 2941225 + 15578809 = 1715^2 + 3947^2 .

It is a super-2 number, since 2×18520034² = 685983318722312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18519991 and 18520009.

It is not an unprimeable number, because it can be changed into a prime (18520031) 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 11 ways as a sum of consecutive naturals, for example, 52892 + ... + 53240.

Almost surely, 2^18520034 is an apocalyptic number.

18520034 is a deficient number, since it is larger than the sum of its proper divisors (11839666).

18520034 is a wasteful number, since it uses less digits than its factorization.

18520034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 18520034 is about 4303.4909085532. The cubic root of 18520034 is about 264.5740588285.

The spelling of 18520034 in words is "eighteen million, five hundred twenty thousand, thirty-four".