18491934 has 32 divisors (see below), whose sum is σ = 39223296. Its totient is φ = 5801760.

The previous prime is 18491929. The next prime is 18491939. The reversal of 18491934 is 43919481.

It is an interprime number because it is at equal distance from previous prime (18491929) and next prime (18491939).

It is a junction number, because it is equal to n+sod(n) for n = 18491892 and 18491901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18491939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5539 + ... + 8225.

It is an arithmetic number, because the mean of its divisors is an integer number (1225728).

Almost surely, 2^18491934 is an apocalyptic number.

18491934 is an abundant number, since it is smaller than the sum of its proper divisors (20731362).

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

18491934 is a wasteful number, since it uses less digits than its factorization.

18491934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2760.

The product of its digits is 31104, while the sum is 39.

The square root of 18491934 is about 4300.2248778407. The cubic root of 18491934 is about 264.4401804871.

The spelling of 18491934 in words is "eighteen million, four hundred ninety-one thousand, nine hundred thirty-four".