18961804 has 12 divisors (see below), whose sum is σ = 33678904. Its totient is φ = 9339264.

The previous prime is 18961793. The next prime is 18961807. The reversal of 18961804 is 40816981.

It is a happy number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18961807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35109 + ... + 35644.

Almost surely, 2^18961804 is an apocalyptic number.

It is an amenable number.

18961804 is a deficient number, since it is larger than the sum of its proper divisors (14717100).

18961804 is a wasteful number, since it uses less digits than its factorization.

18961804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70824 (or 70822 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 18961804 is about 4354.5153576489. The cubic root of 18961804 is about 266.6612339171.

The spelling of 18961804 in words is "eighteen million, nine hundred sixty-one thousand, eight hundred four".