21474511 has 2 divisors, whose sum is σ = 21474512. Its totient is φ = 21474510.

The previous prime is 21474499. The next prime is 21474517. The reversal of 21474511 is 11547412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21474511 - 2¹¹ = 21472463 is a prime.

It is a super-2 number, since 2×21474511² = 922309245378242, which contains 22 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21474517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10737255 + 10737256.

It is an arithmetic number, because the mean of its divisors is an integer number (10737256).

Almost surely, 2^21474511 is an apocalyptic number.

21474511 is a deficient number, since it is larger than the sum of its proper divisors (1).

21474511 is an equidigital number, since it uses as much as digits as its factorization.

21474511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120, while the sum is 25.

The square root of 21474511 is about 4634.0598830831. The cubic root of 21474511 is about 277.9549596648.

The spelling of 21474511 in words is "twenty-one million, four hundred seventy-four thousand, five hundred eleven".