21371907398 has 8 divisors (see below), whose sum is σ = 32739943392. Its totient is φ = 10458592936.

The previous prime is 21371907383. The next prime is 21371907407. The reversal of 21371907398 is 89370917312.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113680265 + ... + 113680452.

It is an arithmetic number, because the mean of its divisors is an integer number (4092492924).

Almost surely, 2^21371907398 is an apocalyptic number.

21371907398 is a deficient number, since it is larger than the sum of its proper divisors (11368035994).

21371907398 is a wasteful number, since it uses less digits than its factorization.

21371907398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227360766.

The product of its (nonzero) digits is 571536, while the sum is 50.

The spelling of 21371907398 in words is "twenty-one billion, three hundred seventy-one million, nine hundred seven thousand, three hundred ninety-eight".