22511938993 has 4 divisors (see below), whose sum is σ = 22543691380. Its totient is φ = 22480186608.

The previous prime is 22511938991. The next prime is 22511938997. The reversal of 22511938993 is 39983911522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39983911522 = 2 ⋅19991955761.

It can be written as a sum of positive squares in 2 ways, for example, as 8262264609 + 14249674384 = 90897^2 + 119372^2 .

It is a cyclic number.

It is not a de Polignac number, because 22511938993 - 2¹ = 22511938991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22511938993.

It is not an unprimeable number, because it can be changed into a prime (22511938991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15875130 + ... + 15876547.

It is an arithmetic number, because the mean of its divisors is an integer number (5635922845).

Almost surely, 2^22511938993 is an apocalyptic number.

It is an amenable number.

22511938993 is a deficient number, since it is larger than the sum of its proper divisors (31752387).

22511938993 is an equidigital number, since it uses as much as digits as its factorization.

22511938993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31752386.

The product of its digits is 1049760, while the sum is 52.

The spelling of 22511938993 in words is "twenty-two billion, five hundred eleven million, nine hundred thirty-eight thousand, nine hundred ninety-three".