21274011 has 24 divisors (see below), whose sum is σ = 34983936. Its totient is φ = 12331440.

The previous prime is 21274009. The next prime is 21274027. The reversal of 21274011 is 11047212.

It is not a de Polignac number, because 21274011 - 2¹ = 21274009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21274031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2395 + ... + 6948.

It is an arithmetic number, because the mean of its divisors is an integer number (1457664).

Almost surely, 2^21274011 is an apocalyptic number.

21274011 is a deficient number, since it is larger than the sum of its proper divisors (13709925).

21274011 is a wasteful number, since it uses less digits than its factorization.

21274011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9383 (or 9380 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 21274011 is about 4612.3758519878. The cubic root of 21274011 is about 277.0871972828.

The spelling of 21274011 in words is "twenty-one million, two hundred seventy-four thousand, eleven".