21369893590 has 8 divisors (see below), whose sum is σ = 38465808480. Its totient is φ = 8547957432.

The previous prime is 21369893581. The next prime is 21369893603. The reversal of 21369893590 is 9539896312.

It is a happy number.

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, 1068494670 + ... + 1068494689.

It is an arithmetic number, because the mean of its divisors is an integer number (4808226060).

Almost surely, 2^21369893590 is an apocalyptic number.

21369893590 is a deficient number, since it is larger than the sum of its proper divisors (17095914890).

21369893590 is a wasteful number, since it uses less digits than its factorization.

21369893590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136989366.

The product of its (nonzero) digits is 3149280, while the sum is 55.

The spelling of 21369893590 in words is "twenty-one billion, three hundred sixty-nine million, eight hundred ninety-three thousand, five hundred ninety".