21499622578274 has 8 divisors (see below), whose sum is σ = 32249669430720. Its totient is φ = 10749732768036.

The previous prime is 21499622578271. The next prime is 21499622578279. The reversal of 21499622578274 is 47287522699412.

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

It is not an unprimeable number, because it can be changed into a prime (21499622578271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38917694 + ... + 39466265.

It is an arithmetic number, because the mean of its divisors is an integer number (4031208678840).

Almost surely, 2^{21499622578274} is an apocalyptic number.

21499622578274 is a deficient number, since it is larger than the sum of its proper divisors (10750046852446).

21499622578274 is a wasteful number, since it uses less digits than its factorization.

21499622578274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78521104.

The product of its digits is 243855360, while the sum is 68.

The spelling of 21499622578274 in words is "twenty-one trillion, four hundred ninety-nine billion, six hundred twenty-two million, five hundred seventy-eight thousand, two hundred seventy-four".