20236473 has 10 divisors (see below), whose sum is σ = 30229914. Its totient is φ = 13490928.

The previous prime is 20236457. The next prime is 20236499. The reversal of 20236473 is 37463202.

It can be written as a sum of positive squares in only one way, i.e., 13749264 + 6487209 = 3708^2 + 2547^2 .

It is not a de Polignac number, because 20236473 - 2⁴ = 20236457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20236423) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 124836 + ... + 124997.

Almost surely, 2^20236473 is an apocalyptic number.

It is an amenable number.

20236473 is a deficient number, since it is larger than the sum of its proper divisors (9993441).

20236473 is an equidigital number, since it uses as much as digits as its factorization.

20236473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249845 (or 249836 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 27.

The square root of 20236473 is about 4498.4967489151. The cubic root of 20236473 is about 272.5073835780.

Adding to 20236473 its reverse (37463202), we get a palindrome (57699675).

The spelling of 20236473 in words is "twenty million, two hundred thirty-six thousand, four hundred seventy-three".