18280831022 has 4 divisors (see below), whose sum is σ = 27421246536. Its totient is φ = 9140415510.

The previous prime is 18280831021. The next prime is 18280831031. The reversal of 18280831022 is 22013808281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22013808281 = 15329 ⋅1436089.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18280831021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4570207754 + ... + 4570207757.

It is an arithmetic number, because the mean of its divisors is an integer number (6855311634).

Almost surely, 2^18280831022 is an apocalyptic number.

18280831022 is a deficient number, since it is larger than the sum of its proper divisors (9140415514).

18280831022 is an equidigital number, since it uses as much as digits as its factorization.

18280831022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9140415513.

The product of its (nonzero) digits is 12288, while the sum is 35.

The spelling of 18280831022 in words is "eighteen billion, two hundred eighty million, eight hundred thirty-one thousand, twenty-two".