21361264274 has 8 divisors (see below), whose sum is σ = 36619310208. Its totient is φ = 9154827540.

The previous prime is 21361264247. The next prime is 21361264343. The reversal of 21361264274 is 47246216312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21361264274² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 762902282 + ... + 762902309.

It is an arithmetic number, because the mean of its divisors is an integer number (4577413776).

Almost surely, 2^21361264274 is an apocalyptic number.

21361264274 is a deficient number, since it is larger than the sum of its proper divisors (15258045934).

21361264274 is a wasteful number, since it uses less digits than its factorization.

21361264274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525804600.

The product of its digits is 96768, while the sum is 38.

The spelling of 21361264274 in words is "twenty-one billion, three hundred sixty-one million, two hundred sixty-four thousand, two hundred seventy-four".