21037274011 has 4 divisors (see below), whose sum is σ = 22655525872. Its totient is φ = 19419022152.

The previous prime is 21037274009. The next prime is 21037274017. The reversal of 21037274011 is 11047273012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21037274011 - 2¹ = 21037274009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21037274017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 809125911 + ... + 809125936.

It is an arithmetic number, because the mean of its divisors is an integer number (5663881468).

Almost surely, 2^21037274011 is an apocalyptic number.

21037274011 is a deficient number, since it is larger than the sum of its proper divisors (1618251861).

21037274011 is a wasteful number, since it uses less digits than its factorization.

21037274011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618251860.

The product of its (nonzero) digits is 2352, while the sum is 28.

Subtracting from 21037274011 its reverse (11047273012), we obtain a palindrome (9990000999).

The spelling of 21037274011 in words is "twenty-one billion, thirty-seven million, two hundred seventy-four thousand, eleven".