18151022 has 4 divisors (see below), whose sum is σ = 27226536. Its totient is φ = 9075510.

The previous prime is 18150997. The next prime is 18151033. The reversal of 18151022 is 22015181.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22015181 = 1697 ⋅12973.

It is a junction number, because it is equal to n+sod(n) for n = 18150985 and 18151003.

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, 4537754 + ... + 4537757.

It is an arithmetic number, because the mean of its divisors is an integer number (6806634).

Almost surely, 2^18151022 is an apocalyptic number.

18151022 is a deficient number, since it is larger than the sum of its proper divisors (9075514).

18151022 is an equidigital number, since it uses as much as digits as its factorization.

18151022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9075513.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 18151022 is about 4260.4016242603. The cubic root of 18151022 is about 262.8050428123.

The spelling of 18151022 in words is "eighteen million, one hundred fifty-one thousand, twenty-two".