18215026242 has 16 divisors (see below), whose sum is σ = 41634345792. Its totient is φ = 5204293200.

The previous prime is 18215026241. The next prime is 18215026243. The reversal of 18215026242 is 24262051281.

It is an interprime number because it is at equal distance from previous prime (18215026241) and next prime (18215026243).

It is not an unprimeable number, because it can be changed into a prime (18215026241) 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, 216845509 + ... + 216845592.

It is an arithmetic number, because the mean of its divisors is an integer number (2602146612).

Almost surely, 2^18215026242 is an apocalyptic number.

18215026242 is an abundant number, since it is smaller than the sum of its proper divisors (23419319550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18215026242 is a wasteful number, since it uses less digits than its factorization.

18215026242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433691113.

The product of its (nonzero) digits is 15360, while the sum is 33.

The spelling of 18215026242 in words is "eighteen billion, two hundred fifteen million, twenty-six thousand, two hundred forty-two".