181018022 has 4 divisors (see below), whose sum is σ = 271527036. Its totient is φ = 90509010.

The previous prime is 181018007. The next prime is 181018039. The reversal of 181018022 is 220810181.

It is a happy number.

181018022 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: 220810181 = 73 ⋅3024797.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45254504 + ... + 45254507.

It is an arithmetic number, because the mean of its divisors is an integer number (67881759).

Almost surely, 2^181018022 is an apocalyptic number.

181018022 is a deficient number, since it is larger than the sum of its proper divisors (90509014).

181018022 is an equidigital number, since it uses as much as digits as its factorization.

181018022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90509013.

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 181018022 is about 13454.2938127573. The cubic root of 181018022 is about 565.6840562128.

The spelling of 181018022 in words is "one hundred eighty-one million, eighteen thousand, twenty-two".