18521934 has 32 divisors (see below), whose sum is σ = 37847040. Its totient is φ = 6041952.

The previous prime is 18521933. The next prime is 18521939. The reversal of 18521934 is 43912581.

It is a junction number, because it is equal to n+sod(n) for n = 18521895 and 18521904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18521933) 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, 82947 + ... + 83169.

It is an arithmetic number, because the mean of its divisors is an integer number (1182720).

Almost surely, 2^18521934 is an apocalyptic number.

18521934 is an abundant number, since it is smaller than the sum of its proper divisors (19325106).

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

18521934 is a wasteful number, since it uses less digits than its factorization.

18521934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464.

The product of its digits is 8640, while the sum is 33.

The square root of 18521934 is about 4303.7116539099. The cubic root of 18521934 is about 264.5831062115.

The spelling of 18521934 in words is "eighteen million, five hundred twenty-one thousand, nine hundred thirty-four".