22387880691 has 48 divisors (see below), whose sum is σ = 37361376000. Its totient is φ = 12784685760.

The previous prime is 22387880651. The next prime is 22387880693. The reversal of 22387880691 is 19608878322.

It is a happy number.

It is not a de Polignac number, because 22387880691 - 2⁷ = 22387880563 is a prime.

It is a hoax number, since the sum of its digits (54) 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 (22387880693) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79185 + ... + 225933.

It is an arithmetic number, because the mean of its divisors is an integer number (778362000).

Almost surely, 2^22387880691 is an apocalyptic number.

22387880691 is a deficient number, since it is larger than the sum of its proper divisors (14973495309).

22387880691 is a wasteful number, since it uses less digits than its factorization.

22387880691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146856 (or 146853 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 22387880691 in words is "twenty-two billion, three hundred eighty-seven million, eight hundred eighty thousand, six hundred ninety-one".