18729486 has 24 divisors (see below), whose sum is σ = 40814280. Its totient is φ = 6207216.

The previous prime is 18729481. The next prime is 18729509. The reversal of 18729486 is 68492781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18729481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 316 + ... + 6128.

It is an arithmetic number, because the mean of its divisors is an integer number (1700595).

Almost surely, 2^18729486 is an apocalyptic number.

18729486 is an abundant number, since it is smaller than the sum of its proper divisors (22084794).

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

18729486 is a wasteful number, since it uses less digits than its factorization.

18729486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6000 (or 5997 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 18729486 is about 4327.7576179819. The cubic root of 18729486 is about 265.5677208165.

The spelling of 18729486 in words is "eighteen million, seven hundred twenty-nine thousand, four hundred eighty-six".