21514899 has 16 divisors (see below), whose sum is σ = 33843200. Its totient is φ = 11897280.

The previous prime is 21514849. The next prime is 21514903. The reversal of 21514899 is 99841512.

It is not a de Polignac number, because 21514899 - 2⁸ = 21514643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21514849) 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, 15874 + ... + 17175.

It is an arithmetic number, because the mean of its divisors is an integer number (2115200).

Almost surely, 2^21514899 is an apocalyptic number.

21514899 is a deficient number, since it is larger than the sum of its proper divisors (12328301).

21514899 is a wasteful number, since it uses less digits than its factorization.

21514899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33090.

The product of its digits is 25920, while the sum is 39.

The square root of 21514899 is about 4638.4155699980. The cubic root of 21514899 is about 278.1291043286.

The spelling of 21514899 in words is "twenty-one million, five hundred fourteen thousand, eight hundred ninety-nine".