21450049 has 8 divisors (see below), whose sum is σ = 21688448. Its totient is φ = 21213360.

The previous prime is 21450029. The next prime is 21450061. The reversal of 21450049 is 94005412.

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

It is a cyclic number.

It is not a de Polignac number, because 21450049 - 2¹³ = 21441857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21450019) 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 7 ways as a sum of consecutive naturals, for example, 58264 + ... + 58630.

It is an arithmetic number, because the mean of its divisors is an integer number (2711056).

Almost surely, 2^21450049 is an apocalyptic number.

It is an amenable number.

21450049 is a deficient number, since it is larger than the sum of its proper divisors (238399).

21450049 is a wasteful number, since it uses less digits than its factorization.

21450049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 21450049 is about 4631.4197607213. The cubic root of 21450049 is about 277.8493784077.

The spelling of 21450049 in words is "twenty-one million, four hundred fifty thousand, forty-nine".