21326806502 has 8 divisors (see below), whose sum is σ = 31991087376. Its totient is φ = 10663110712.

The previous prime is 21326806499. The next prime is 21326806541. The reversal of 21326806502 is 20560862312.

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, 39578 + ... + 210285.

It is an arithmetic number, because the mean of its divisors is an integer number (3998885922).

Almost surely, 2^21326806502 is an apocalyptic number.

21326806502 is a deficient number, since it is larger than the sum of its proper divisors (10664280874).

21326806502 is a wasteful number, since it uses less digits than its factorization.

21326806502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292542.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 21326806502 in words is "twenty-one billion, three hundred twenty-six million, eight hundred six thousand, five hundred two".