22491811493 has 16 divisors (see below), whose sum is σ = 22988560896. Its totient is φ = 22000310640.

The previous prime is 22491811439. The next prime is 22491811499. The reversal of 22491811493 is 39411819422.

It is a cyclic number.

It is not a de Polignac number, because 22491811493 - 2¹⁸ = 22491549349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22491811499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7109330 + ... + 7112492.

It is an arithmetic number, because the mean of its divisors is an integer number (1436785056).

Almost surely, 2^22491811493 is an apocalyptic number.

It is an amenable number.

22491811493 is a deficient number, since it is larger than the sum of its proper divisors (496749403).

22491811493 is a wasteful number, since it uses less digits than its factorization.

22491811493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3944.

The product of its digits is 124416, while the sum is 44.

The spelling of 22491811493 in words is "twenty-two billion, four hundred ninety-one million, eight hundred eleven thousand, four hundred ninety-three".