22506136457 has 4 divisors (see below), whose sum is σ = 25721298816. Its totient is φ = 19290974100.

The previous prime is 22506136451. The next prime is 22506136463. The reversal of 22506136457 is 75463160522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75463160522 = 2 ⋅37731580261.

It is an interprime number because it is at equal distance from previous prime (22506136451) and next prime (22506136463).

It is a cyclic number.

It is not a de Polignac number, because 22506136457 - 2⁴ = 22506136441 is a prime.

It is a super-2 number, since 2×22506136457² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22506136451) 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, 1607581169 + ... + 1607581182.

It is an arithmetic number, because the mean of its divisors is an integer number (6430324704).

Almost surely, 2^22506136457 is an apocalyptic number.

It is an amenable number.

22506136457 is a deficient number, since it is larger than the sum of its proper divisors (3215162359).

22506136457 is an equidigital number, since it uses as much as digits as its factorization.

22506136457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3215162358.

The product of its (nonzero) digits is 302400, while the sum is 41.

Adding to 22506136457 its reverse (75463160522), we get a palindrome (97969296979).

The spelling of 22506136457 in words is "twenty-two billion, five hundred six million, one hundred thirty-six thousand, four hundred fifty-seven".