181993342 has 16 divisors (see below), whose sum is σ = 291809952. Its totient is φ = 84916480.

The previous prime is 181993337. The next prime is 181993349. The reversal of 181993342 is 243399181.

It is a junction number, because it is equal to n+sod(n) for n = 181993295 and 181993304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181993349) 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, 46363 + ... + 50134.

It is an arithmetic number, because the mean of its divisors is an integer number (18238122).

Almost surely, 2^181993342 is an apocalyptic number.

181993342 is a deficient number, since it is larger than the sum of its proper divisors (109816610).

181993342 is a wasteful number, since it uses less digits than its factorization.

181993342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96563.

The product of its digits is 46656, while the sum is 40.

The square root of 181993342 is about 13490.4907990777. The cubic root of 181993342 is about 566.6982002444.

The spelling of 181993342 in words is "one hundred eighty-one million, nine hundred ninety-three thousand, three hundred forty-two".