22691399428 has 12 divisors (see below), whose sum is σ = 39712710352. Its totient is φ = 11344910760.

The previous prime is 22691399413. The next prime is 22691399429. The reversal of 22691399428 is 82499319622.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (22691399429) 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, 129978 + ... + 249553.

Almost surely, 2^22691399428 is an apocalyptic number.

It is an amenable number.

22691399428 is a deficient number, since it is larger than the sum of its proper divisors (17021310924).

22691399428 is a wasteful number, since it uses less digits than its factorization.

22691399428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394482 (or 394480 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 55.

The spelling of 22691399428 in words is "twenty-two billion, six hundred ninety-one million, three hundred ninety-nine thousand, four hundred twenty-eight".