22991147848 has 32 divisors (see below), whose sum is σ = 44101713600. Its totient is φ = 11233026112.

The previous prime is 22991147831. The next prime is 22991147849. The reversal of 22991147848 is 84874119922.

It is a super-2 number, since 2×22991147848² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22991147849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67015 + ... + 224662.

It is an arithmetic number, because the mean of its divisors is an integer number (1378178550).

Almost surely, 2^22991147848 is an apocalyptic number.

It is an amenable number.

22991147848 is a deficient number, since it is larger than the sum of its proper divisors (21110565752).

22991147848 is a wasteful number, since it uses less digits than its factorization.

22991147848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291909 (or 291905 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 55.

The spelling of 22991147848 in words is "twenty-two billion, nine hundred ninety-one million, one hundred forty-seven thousand, eight hundred forty-eight".