21674317284 has 45 divisors (see below), whose sum is σ = 56667875187. Its totient is φ = 7223889096.

The previous prime is 21674317261. The next prime is 21674317307. The reversal of 21674317284 is 48271347612.

The square root of 21674317284 is 147222.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (21674317261) and next prime (21674317307).

It is a super-2 number, since 2×21674317284² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 2645907 + ... + 2654085.

Almost surely, 2^21674317284 is an apocalyptic number.

21674317284 is the 147222-nd square number.

It is an amenable number.

21674317284 is an abundant number, since it is smaller than the sum of its proper divisors (34993557903).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21674317284 is an frugal number, since it uses more digits than its factorization.

21674317284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16374 (or 8184 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The spelling of 21674317284 in words is "twenty-one billion, six hundred seventy-four million, three hundred seventeen thousand, two hundred eighty-four".