21471194708 has 12 divisors (see below), whose sum is σ = 37578515520. Its totient is φ = 10734475992.

The previous prime is 21471194699. The next prime is 21471194711. The reversal of 21471194708 is 80749117412.

It is a super-2 number, since 2×21471194708² (a number of 21 digits) contains 22 as substring.

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, 236498 + ... + 314441.

It is an arithmetic number, because the mean of its divisors is an integer number (3131542960).

Almost surely, 2^21471194708 is an apocalyptic number.

It is an amenable number.

21471194708 is a deficient number, since it is larger than the sum of its proper divisors (16107320812).

21471194708 is a wasteful number, since it uses less digits than its factorization.

21471194708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560686 (or 560684 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 44.

The spelling of 21471194708 in words is "twenty-one billion, four hundred seventy-one million, one hundred ninety-four thousand, seven hundred eight".