22405021798 has 4 divisors (see below), whose sum is σ = 33607532700. Its totient is φ = 11202510898.

The previous prime is 22405021783. The next prime is 22405021813. The reversal of 22405021798 is 89712050422.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (22405021783) and next prime (22405021813).

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 22405021798.

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, 5601255448 + ... + 5601255451.

It is an arithmetic number, because the mean of its divisors is an integer number (8401883175).

Almost surely, 2^22405021798 is an apocalyptic number.

22405021798 is a deficient number, since it is larger than the sum of its proper divisors (11202510902).

22405021798 is a wasteful number, since it uses less digits than its factorization.

22405021798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11202510901.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 22405021798 in words is "twenty-two billion, four hundred five million, twenty-one thousand, seven hundred ninety-eight".