21304416742 has 8 divisors (see below), whose sum is σ = 36521857296. Its totient is φ = 9130464312.

The previous prime is 21304416737. The next prime is 21304416797. The reversal of 21304416742 is 24761440312.

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

It is a junction number, because it is equal to n+sod(n) for n = 21304416698 and 21304416707.

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, 760872013 + ... + 760872040.

It is an arithmetic number, because the mean of its divisors is an integer number (4565232162).

Almost surely, 2^21304416742 is an apocalyptic number.

21304416742 is a deficient number, since it is larger than the sum of its proper divisors (15217440554).

21304416742 is a wasteful number, since it uses less digits than its factorization.

21304416742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521744062.

The product of its (nonzero) digits is 32256, while the sum is 34.

The spelling of 21304416742 in words is "twenty-one billion, three hundred four million, four hundred sixteen thousand, seven hundred forty-two".