18436772 has 12 divisors (see below), whose sum is σ = 34162380. Its totient is φ = 8676096.

The previous prime is 18436763. The next prime is 18436787. The reversal of 18436772 is 27763481.

It can be written as a sum of positive squares in 2 ways, for example, as 16859236 + 1577536 = 4106^2 + 1256^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135497 + ... + 135632.

It is an arithmetic number, because the mean of its divisors is an integer number (2846865).

Almost surely, 2^18436772 is an apocalyptic number.

It is an amenable number.

18436772 is a deficient number, since it is larger than the sum of its proper divisors (15725608).

18436772 is a wasteful number, since it uses less digits than its factorization.

18436772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271150 (or 271148 counting only the distinct ones).

The product of its digits is 56448, while the sum is 38.

The square root of 18436772 is about 4293.8062368952. The cubic root of 18436772 is about 264.1769742363.

The spelling of 18436772 in words is "eighteen million, four hundred thirty-six thousand, seven hundred seventy-two".