181994070 has 16 divisors (see below), whose sum is σ = 436785840. Its totient is φ = 48531744.

The previous prime is 181994051. The next prime is 181994089. The reversal of 181994070 is 70499181.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (181994051) and next prime (181994089).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3033205 + ... + 3033264.

It is an arithmetic number, because the mean of its divisors is an integer number (27299115).

Almost surely, 2^181994070 is an apocalyptic number.

181994070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

181994070 is an abundant number, since it is smaller than the sum of its proper divisors (254791770).

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

181994070 is a wasteful number, since it uses less digits than its factorization.

181994070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6066479.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 181994070 is about 13490.5177810194. The cubic root of 181994070 is about 566.6989558687.

The spelling of 181994070 in words is "one hundred eighty-one million, nine hundred ninety-four thousand, seventy".