21514895 has 4 divisors (see below), whose sum is σ = 25817880. Its totient is φ = 17211912.

The previous prime is 21514849. The next prime is 21514903. The reversal of 21514895 is 59841512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21514895 - 2¹⁴ = 21498511 is a prime.

It is a super-2 number, since 2×21514895² = 925781413722050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 2151485 + ... + 2151494.

It is an arithmetic number, because the mean of its divisors is an integer number (6454470).

Almost surely, 2^21514895 is an apocalyptic number.

21514895 is a deficient number, since it is larger than the sum of its proper divisors (4302985).

21514895 is an equidigital number, since it uses as much as digits as its factorization.

21514895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4302984.

The product of its digits is 14400, while the sum is 35.

The square root of 21514895 is about 4638.4151388163. The cubic root of 21514895 is about 278.1290870922.

The spelling of 21514895 in words is "twenty-one million, five hundred fourteen thousand, eight hundred ninety-five".