22157247494 has 4 divisors (see below), whose sum is σ = 33235871244. Its totient is φ = 11078623746.

The previous prime is 22157247481. The next prime is 22157247509. The reversal of 22157247494 is 49474275122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49474275122 = 2 ⋅24737137561.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5539311872 + ... + 5539311875.

It is an arithmetic number, because the mean of its divisors is an integer number (8308967811).

Almost surely, 2^22157247494 is an apocalyptic number.

22157247494 is a deficient number, since it is larger than the sum of its proper divisors (11078623750).

22157247494 is a wasteful number, since it uses less digits than its factorization.

22157247494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11078623749.

The product of its digits is 1128960, while the sum is 47.

The spelling of 22157247494 in words is "twenty-two billion, one hundred fifty-seven million, two hundred forty-seven thousand, four hundred ninety-four".