21170747476 has 12 divisors (see below), whose sum is σ = 37050578208. Its totient is φ = 10584867992.

The previous prime is 21170747443. The next prime is 21170747483. The reversal of 21170747476 is 67474707112.

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, 22816 + ... + 207031.

It is an arithmetic number, because the mean of its divisors is an integer number (3087548184).

Almost surely, 2^21170747476 is an apocalyptic number.

It is an amenable number.

21170747476 is a deficient number, since it is larger than the sum of its proper divisors (15879830732).

21170747476 is a wasteful number, since it uses less digits than its factorization.

21170747476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252878 (or 252876 counting only the distinct ones).

The product of its (nonzero) digits is 460992, while the sum is 46.

The spelling of 21170747476 in words is "twenty-one billion, one hundred seventy million, seven hundred forty-seven thousand, four hundred seventy-six".