21236089814 has 8 divisors (see below), whose sum is σ = 31878143328. Its totient is φ = 10610042040.

The previous prime is 21236089783. The next prime is 21236089837. The reversal of 21236089814 is 41898063212.

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 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, 3998117 + ... + 4003424.

It is an arithmetic number, because the mean of its divisors is an integer number (3984767916).

Almost surely, 2^21236089814 is an apocalyptic number.

21236089814 is a deficient number, since it is larger than the sum of its proper divisors (10642053514).

21236089814 is a wasteful number, since it uses less digits than its factorization.

21236089814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8002870.

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 21236089814 in words is "twenty-one billion, two hundred thirty-six million, eighty-nine thousand, eight hundred fourteen".