21274230285 has 192 divisors, whose sum is σ = 48492864000. Its totient is φ = 8838910080.

The previous prime is 21274230247. The next prime is 21274230343. The reversal of 21274230285 is 58203247212.

21274230285 is a `hidden beast` number, since 2 + 1 + 274 + 2 + 302 + 85 = 666.

It is not a de Polignac number, because 21274230285 - 2¹⁴ = 21274213901 is a prime.

It is a super-2 number, since 2×21274230285² (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 191 ways as a sum of consecutive naturals, for example, 5601007 + ... + 5604803.

It is an arithmetic number, because the mean of its divisors is an integer number (252567000).

Almost surely, 2^21274230285 is an apocalyptic number.

It is an amenable number.

21274230285 is an abundant number, since it is smaller than the sum of its proper divisors (27218633715).

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

21274230285 is a wasteful number, since it uses less digits than its factorization.

21274230285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3854 (or 3823 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

Adding to 21274230285 its reverse (58203247212), we get a palindrome (79477477497).

The spelling of 21274230285 in words is "twenty-one billion, two hundred seventy-four million, two hundred thirty thousand, two hundred eighty-five".