21724096894 has 8 divisors (see below), whose sum is σ = 32587105968. Its totient is φ = 10861728240.

The previous prime is 21724096871. The next prime is 21724096897. The reversal of 21724096894 is 49869042712.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21724096897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63687 + ... + 217954.

It is an arithmetic number, because the mean of its divisors is an integer number (4073388246).

Almost surely, 2^21724096894 is an apocalyptic number.

21724096894 is a deficient number, since it is larger than the sum of its proper divisors (10863009074).

21724096894 is a wasteful number, since it uses less digits than its factorization.

21724096894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320210.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 21724096894 in words is "twenty-one billion, seven hundred twenty-four million, ninety-six thousand, eight hundred ninety-four".