18729116 has 24 divisors (see below), whose sum is σ = 37914240. Its totient is φ = 7929072.

The previous prime is 18729103. The next prime is 18729119. The reversal of 18729116 is 61192781.

It is a super-2 number, since 2×18729116² = 701559572282912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18729119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1706 + ... + 6353.

It is an arithmetic number, because the mean of its divisors is an integer number (1579760).

Almost surely, 2^18729116 is an apocalyptic number.

It is an amenable number.

18729116 is an abundant number, since it is smaller than the sum of its proper divisors (19185124).

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

18729116 is a wasteful number, since it uses less digits than its factorization.

18729116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8153 (or 8151 counting only the distinct ones).

The product of its digits is 6048, while the sum is 35.

The square root of 18729116 is about 4327.7148704599. The cubic root of 18729116 is about 265.5659720462.

The spelling of 18729116 in words is "eighteen million, seven hundred twenty-nine thousand, one hundred sixteen".