21472337 has 4 divisors (see below), whose sum is σ = 22602480. Its totient is φ = 20342196.

The previous prime is 21472313. The next prime is 21472379. The reversal of 21472337 is 73327412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21472337 - 2⁶ = 21472273 is a prime.

It is a super-2 number, since 2×21472337² = 922122512483138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21472537) 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 3 ways as a sum of consecutive naturals, for example, 565043 + ... + 565080.

It is an arithmetic number, because the mean of its divisors is an integer number (5650620).

Almost surely, 2^21472337 is an apocalyptic number.

It is an amenable number.

21472337 is a deficient number, since it is larger than the sum of its proper divisors (1130143).

21472337 is a wasteful number, since it uses less digits than its factorization.

21472337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130142.

The product of its digits is 7056, while the sum is 29.

The square root of 21472337 is about 4633.8253096119. The cubic root of 21472337 is about 277.9455796379.

Adding to 21472337 its reverse (73327412), we get a palindrome (94799749).

The spelling of 21472337 in words is "twenty-one million, four hundred seventy-two thousand, three hundred thirty-seven".