21514737 has 4 divisors (see below), whose sum is σ = 28686320. Its totient is φ = 14343156.

The previous prime is 21514721. The next prime is 21514739. The reversal of 21514737 is 73741512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21514737 - 2⁴ = 21514721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21514739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3585787 + ... + 3585792.

It is an arithmetic number, because the mean of its divisors is an integer number (7171580).

Almost surely, 2^21514737 is an apocalyptic number.

It is an amenable number.

21514737 is a deficient number, since it is larger than the sum of its proper divisors (7171583).

21514737 is an equidigital number, since it uses as much as digits as its factorization.

21514737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7171582.

The product of its digits is 5880, while the sum is 30.

The square root of 21514737 is about 4638.3981071055. The cubic root of 21514737 is about 278.1284062538.

The spelling of 21514737 in words is "twenty-one million, five hundred fourteen thousand, seven hundred thirty-seven".