18981362 has 16 divisors (see below), whose sum is σ = 29894400. Its totient is φ = 9027120.

The previous prime is 18981359. The next prime is 18981377. The reversal of 18981362 is 26318981.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1064 + ... + 6252.

It is an arithmetic number, because the mean of its divisors is an integer number (1868400).

Almost surely, 2^18981362 is an apocalyptic number.

18981362 is a deficient number, since it is larger than the sum of its proper divisors (10913038).

18981362 is a wasteful number, since it uses less digits than its factorization.

18981362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5281.

The product of its digits is 20736, while the sum is 38.

The square root of 18981362 is about 4356.7604937614. The cubic root of 18981362 is about 266.7528842742.

The spelling of 18981362 in words is "eighteen million, nine hundred eighty-one thousand, three hundred sixty-two".