181113690 has 32 divisors (see below), whose sum is σ = 435030336. Its totient is φ = 48257280.

The previous prime is 181113689. The next prime is 181113781. The reversal of 181113690 is 96311181.

It is a super-2 number, since 2×181113690² = 65604337410832200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62514 + ... + 65346.

It is an arithmetic number, because the mean of its divisors is an integer number (13594698).

Almost surely, 2^181113690 is an apocalyptic number.

181113690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

181113690 is an abundant number, since it is smaller than the sum of its proper divisors (253916646).

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

181113690 is a wasteful number, since it uses less digits than its factorization.

181113690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4974.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 181113690 is about 13457.8486393628. The cubic root of 181113690 is about 565.7836933111.

The spelling of 181113690 in words is "one hundred eighty-one million, one hundred thirteen thousand, six hundred ninety".