22194402261 has 4 divisors (see below), whose sum is σ = 29592536352. Its totient is φ = 14796268172.

The previous prime is 22194402259. The next prime is 22194402277. The reversal of 22194402261 is 16220449122.

It is a happy number.

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 22194402261 - 2¹ = 22194402259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22194402281) 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, 3699067041 + ... + 3699067046.

It is an arithmetic number, because the mean of its divisors is an integer number (7398134088).

Almost surely, 2^22194402261 is an apocalyptic number.

It is an amenable number.

22194402261 is a deficient number, since it is larger than the sum of its proper divisors (7398134091).

22194402261 is an equidigital number, since it uses as much as digits as its factorization.

22194402261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7398134090.

The product of its (nonzero) digits is 13824, while the sum is 33.

The spelling of 22194402261 in words is "twenty-two billion, one hundred ninety-four million, four hundred two thousand, two hundred sixty-one".