21709047482 has 16 divisors (see below), whose sum is σ = 32616616032. Its totient is φ = 10836858480.

The previous prime is 21709047473. The next prime is 21709047497. The reversal of 21709047482 is 28474090712.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4215233 + ... + 4220379.

It is an arithmetic number, because the mean of its divisors is an integer number (2038538502).

Almost surely, 2^21709047482 is an apocalyptic number.

21709047482 is a deficient number, since it is larger than the sum of its proper divisors (10907568550).

21709047482 is a wasteful number, since it uses less digits than its factorization.

21709047482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8173.

The product of its (nonzero) digits is 225792, while the sum is 44.

The spelling of 21709047482 in words is "twenty-one billion, seven hundred nine million, forty-seven thousand, four hundred eighty-two".