22154874649 has 4 divisors (see below), whose sum is σ = 22670104336. Its totient is φ = 21639644964.

The previous prime is 22154874641. The next prime is 22154874661. The reversal of 22154874649 is 94647845122.

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.

It is a cyclic number.

It is not a de Polignac number, because 22154874649 - 2³ = 22154874641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22154874596 and 22154874605.

It is not an unprimeable number, because it can be changed into a prime (22154874641) 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, 257614779 + ... + 257614864.

It is an arithmetic number, because the mean of its divisors is an integer number (5667526084).

Almost surely, 2^22154874649 is an apocalyptic number.

It is an amenable number.

22154874649 is a deficient number, since it is larger than the sum of its proper divisors (515229687).

22154874649 is an equidigital number, since it uses as much as digits as its factorization.

22154874649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515229686.

The product of its digits is 3870720, while the sum is 52.

The spelling of 22154874649 in words is "twenty-two billion, one hundred fifty-four million, eight hundred seventy-four thousand, six hundred forty-nine".