21114513 has 24 divisors (see below), whose sum is σ = 36149568. Its totient is φ = 12064464.

The previous prime is 21114463. The next prime is 21114521. The reversal of 21114513 is 31541112.

21114513 is a `hidden beast` number, since 211 + 1 + 451 + 3 = 666.

It is not a de Polignac number, because 21114513 - 2⁸ = 21114257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21114563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4506 + ... + 7907.

It is an arithmetic number, because the mean of its divisors is an integer number (1506232).

Almost surely, 2^21114513 is an apocalyptic number.

It is an amenable number.

21114513 is a deficient number, since it is larger than the sum of its proper divisors (15035055).

21114513 is an equidigital number, since it uses as much as digits as its factorization.

21114513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12435 (or 12423 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 21114513 is about 4595.0531008901. The cubic root of 21114513 is about 276.3929893164.

Adding to 21114513 its reverse (31541112), we get a palindrome (52655625).

The spelling of 21114513 in words is "twenty-one million, one hundred fourteen thousand, five hundred thirteen".