18930534 has 16 divisors (see below), whose sum is σ = 43269888. Its totient is φ = 5408712.

The previous prime is 18930529. The next prime is 18930539. The reversal of 18930534 is 43503981.

It is an interprime number because it is at equal distance from previous prime (18930529) and next prime (18930539).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18930495 and 18930504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18930539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225322 + ... + 225405.

It is an arithmetic number, because the mean of its divisors is an integer number (2704368).

Almost surely, 2^18930534 is an apocalyptic number.

18930534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18930534 is an abundant number, since it is smaller than the sum of its proper divisors (24339354).

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

18930534 is a wasteful number, since it uses less digits than its factorization.

18930534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450739.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 18930534 is about 4350.9233502787. The cubic root of 18930534 is about 266.5145691681.

The spelling of 18930534 in words is "eighteen million, nine hundred thirty thousand, five hundred thirty-four".