22154538398 has 8 divisors (see below), whose sum is σ = 33232444392. Its totient is φ = 11077056936.

The previous prime is 22154538353. The next prime is 22154538401. The reversal of 22154538398 is 89383545122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×22154538398³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125036 + ... + 244832.

It is an arithmetic number, because the mean of its divisors is an integer number (4154055549).

Almost surely, 2^22154538398 is an apocalyptic number.

22154538398 is a deficient number, since it is larger than the sum of its proper divisors (11077905994).

22154538398 is a wasteful number, since it uses less digits than its factorization.

22154538398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212266.

The product of its digits is 2073600, while the sum is 50.

The spelling of 22154538398 in words is "twenty-two billion, one hundred fifty-four million, five hundred thirty-eight thousand, three hundred ninety-eight".