22018481238 has 32 divisors (see below), whose sum is σ = 47431893600. Its totient is φ = 6773849856.

The previous prime is 22018481213. The next prime is 22018481273. The reversal of 22018481238 is 83218481022.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 22018481196 and 22018481205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 579778 + ... + 616586.

It is an arithmetic number, because the mean of its divisors is an integer number (1482246675).

Almost surely, 2^22018481238 is an apocalyptic number.

22018481238 is an abundant number, since it is smaller than the sum of its proper divisors (25413412362).

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

22018481238 is a wasteful number, since it uses less digits than its factorization.

22018481238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44496.

The product of its (nonzero) digits is 49152, while the sum is 39.

The spelling of 22018481238 in words is "twenty-two billion, eighteen million, four hundred eighty-one thousand, two hundred thirty-eight".