21474049 has 8 divisors (see below), whose sum is σ = 21749760. Its totient is φ = 21200256.

The previous prime is 21474031. The next prime is 21474059. The reversal of 21474049 is 94047412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21474049 is a prime.

It is a super-2 number, since 2×21474049² = 922269560908802, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21474049.

It is not an unprimeable number, because it can be changed into a prime (21474059) 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, 44592 + ... + 45070.

It is an arithmetic number, because the mean of its divisors is an integer number (2718720).

Almost surely, 2^21474049 is an apocalyptic number.

It is an amenable number.

21474049 is a deficient number, since it is larger than the sum of its proper divisors (275711).

21474049 is a wasteful number, since it uses less digits than its factorization.

21474049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 21474049 is about 4634.0100345165. The cubic root of 21474049 is about 277.9529663542.

The spelling of 21474049 in words is "twenty-one million, four hundred seventy-four thousand, forty-nine".