181968022 has 4 divisors (see below), whose sum is σ = 272952036. Its totient is φ = 90984010.

The previous prime is 181967971. The next prime is 181968029. The reversal of 181968022 is 220869181.

181968022 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 220869181 = 13 ⋅16989937.

It is a super-2 number, since 2×181968022² = 66224722061184968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181968029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45492004 + ... + 45492007.

It is an arithmetic number, because the mean of its divisors is an integer number (68238009).

Almost surely, 2^181968022 is an apocalyptic number.

181968022 is a deficient number, since it is larger than the sum of its proper divisors (90984014).

181968022 is an equidigital number, since it uses as much as digits as its factorization.

181968022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90984013.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 181968022 is about 13489.5523276349. The cubic root of 181968022 is about 566.6719182135.

The spelling of 181968022 in words is "one hundred eighty-one million, nine hundred sixty-eight thousand, twenty-two".