21514493 has 16 divisors (see below), whose sum is σ = 28887936. Its totient is φ = 15474240.

The previous prime is 21514483. The next prime is 21514531. The reversal of 21514493 is 39441512.

It is a cyclic number.

It is not a de Polignac number, because 21514493 - 2⁶ = 21514429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21514483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9746 + ... + 11747.

It is an arithmetic number, because the mean of its divisors is an integer number (1805496).

Almost surely, 2^21514493 is an apocalyptic number.

It is an amenable number.

21514493 is a deficient number, since it is larger than the sum of its proper divisors (7373443).

21514493 is a wasteful number, since it uses less digits than its factorization.

21514493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21524.

The product of its digits is 4320, while the sum is 29.

The square root of 21514493 is about 4638.3718048470. The cubic root of 21514493 is about 278.1273548258.

The spelling of 21514493 in words is "twenty-one million, five hundred fourteen thousand, four hundred ninety-three".