20331473 has 8 divisors (see below), whose sum is σ = 21582792. Its totient is φ = 19086336.

The previous prime is 20331469. The next prime is 20331481. The reversal of 20331473 is 37413302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15460624 + 4870849 = 3932^2 + 2207^2 .

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 20331473 - 2² = 20331469 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20331403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6461 + ... + 9077.

It is an arithmetic number, because the mean of its divisors is an integer number (2697849).

Almost surely, 2^20331473 is an apocalyptic number.

It is an amenable number.

20331473 is a deficient number, since it is larger than the sum of its proper divisors (1251319).

20331473 is a wasteful number, since it uses less digits than its factorization.

20331473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3091.

The product of its (nonzero) digits is 1512, while the sum is 23.

The square root of 20331473 is about 4509.0434684088. The cubic root of 20331473 is about 272.9331461124.

Adding to 20331473 its reverse (37413302), we get a palindrome (57744775).

The spelling of 20331473 in words is "twenty million, three hundred thirty-one thousand, four hundred seventy-three".