18740634 has 16 divisors (see below), whose sum is σ = 40888800. Its totient is φ = 5678960.

The previous prime is 18740629. The next prime is 18740677. The reversal of 18740634 is 43604781.

18740634 is nontrivially palindromic in base 12.

It is a super-2 number, since 2×18740634² = 702422725443912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 18740595 and 18740604.

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, 141909 + ... + 142040.

It is an arithmetic number, because the mean of its divisors is an integer number (2555550).

Almost surely, 2^18740634 is an apocalyptic number.

18740634 is an abundant number, since it is smaller than the sum of its proper divisors (22148166).

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

18740634 is a wasteful number, since it uses less digits than its factorization.

18740634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283965.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 18740634 is about 4329.0453913074. The cubic root of 18740634 is about 265.6203999942.

The spelling of 18740634 in words is "eighteen million, seven hundred forty thousand, six hundred thirty-four".