21471771304 has 16 divisors (see below), whose sum is σ = 41558267520. Its totient is φ = 10389566640.

The previous prime is 21471771271. The next prime is 21471771319. The reversal of 21471771304 is 40317717412.

It is a super-2 number, since 2×21471771304² (a number of 21 digits) contains 22 as substring.

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, 43289614 + ... + 43290109.

It is an arithmetic number, because the mean of its divisors is an integer number (2597391720).

Almost surely, 2^21471771304 is an apocalyptic number.

It is an amenable number.

21471771304 is a deficient number, since it is larger than the sum of its proper divisors (20086496216).

21471771304 is a wasteful number, since it uses less digits than its factorization.

21471771304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86579760 (or 86579756 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 37.

The spelling of 21471771304 in words is "twenty-one billion, four hundred seventy-one million, seven hundred seventy-one thousand, three hundred four".