21450995 has 8 divisors (see below), whose sum is σ = 26369280. Its totient is φ = 16742080.

The previous prime is 21450971. The next prime is 21451007. The reversal of 21450995 is 59905412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21450995 - 2⁶ = 21450931 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52115 + ... + 52524.

It is an arithmetic number, because the mean of its divisors is an integer number (3296160).

Almost surely, 2^21450995 is an apocalyptic number.

21450995 is a deficient number, since it is larger than the sum of its proper divisors (4918285).

21450995 is a wasteful number, since it uses less digits than its factorization.

21450995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104685.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 21450995 is about 4631.5218881055. The cubic root of 21450995 is about 277.8534629616.

The spelling of 21450995 in words is "twenty-one million, four hundred fifty thousand, nine hundred ninety-five".