22494406991 has 16 divisors (see below), whose sum is σ = 26301757440. Its totient is φ = 18840556800.

The previous prime is 22494406981. The next prime is 22494406997. The reversal of 22494406991 is 19960449422.

It is a cyclic number.

It is not a de Polignac number, because 22494406991 - 2²² = 22490212687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22494406997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156035 + ... + 263316.

It is an arithmetic number, because the mean of its divisors is an integer number (1643859840).

Almost surely, 2^22494406991 is an apocalyptic number.

22494406991 is a deficient number, since it is larger than the sum of its proper divisors (3807350449).

22494406991 is an equidigital number, since it uses as much as digits as its factorization.

22494406991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419534.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The spelling of 22494406991 in words is "twenty-two billion, four hundred ninety-four million, four hundred six thousand, nine hundred ninety-one".