22994358887638 has 4 divisors (see below), whose sum is σ = 34491538331460. Its totient is φ = 11497179443818.

The previous prime is 22994358887597. The next prime is 22994358887639. The reversal of 22994358887638 is 83678885349922.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22994358887639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5748589721908 + ... + 5748589721911.

It is an arithmetic number, because the mean of its divisors is an integer number (8622884582865).

Almost surely, 2^{22994358887638} is an apocalyptic number.

22994358887638 is a deficient number, since it is larger than the sum of its proper divisors (11497179443822).

22994358887638 is a wasteful number, since it uses less digits than its factorization.

22994358887638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11497179443821.

The product of its digits is 10032906240, while the sum is 82.

The spelling of 22994358887638 in words is "twenty-two trillion, nine hundred ninety-four billion, three hundred fifty-eight million, eight hundred eighty-seven thousand, six hundred thirty-eight".