18880534 has 4 divisors (see below), whose sum is σ = 28320804. Its totient is φ = 9440266.

The previous prime is 18880529. The next prime is 18880553. The reversal of 18880534 is 43508881.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 18880493 and 18880502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4720132 + ... + 4720135.

It is an arithmetic number, because the mean of its divisors is an integer number (7080201).

Almost surely, 2^18880534 is an apocalyptic number.

18880534 is a deficient number, since it is larger than the sum of its proper divisors (9440270).

18880534 is an equidigital number, since it uses as much as digits as its factorization.

18880534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9440269.

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 18880534 is about 4345.1736444013. The cubic root of 18880534 is about 266.2797196945.

The spelling of 18880534 in words is "eighteen million, eight hundred eighty thousand, five hundred thirty-four".