21266859374 has 8 divisors (see below), whose sum is σ = 31934630160. Its totient is φ = 10621982656.

The previous prime is 21266859347. The next prime is 21266859421. The reversal of 21266859374 is 47395866212.

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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5721194 + ... + 5724909.

It is an arithmetic number, because the mean of its divisors is an integer number (3991828770).

Almost surely, 2^21266859374 is an apocalyptic number.

21266859374 is a deficient number, since it is larger than the sum of its proper divisors (10667770786).

21266859374 is a wasteful number, since it uses less digits than its factorization.

21266859374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11447034.

The product of its digits is 4354560, while the sum is 53.

The spelling of 21266859374 in words is "twenty-one billion, two hundred sixty-six million, eight hundred fifty-nine thousand, three hundred seventy-four".