21472303 has 8 divisors (see below), whose sum is σ = 21772800. Its totient is φ = 21174168.

The previous prime is 21472291. The next prime is 21472313. The reversal of 21472303 is 30327412.

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 21472303 - 2¹³ = 21464111 is a prime.

It is a super-2 number, since 2×21472303² = 922119592247618, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21472313) by changing a digit.

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, 24450 + ... + 25312.

It is an arithmetic number, because the mean of its divisors is an integer number (2721600).

Almost surely, 2^21472303 is an apocalyptic number.

21472303 is a deficient number, since it is larger than the sum of its proper divisors (300497).

21472303 is a wasteful number, since it uses less digits than its factorization.

21472303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 21472303 is about 4633.8216409353. The cubic root of 21472303 is about 277.9454329351.

Adding to 21472303 its reverse (30327412), we get a palindrome (51799715).

The spelling of 21472303 in words is "twenty-one million, four hundred seventy-two thousand, three hundred three".