20369473 has 4 divisors (see below), whose sum is σ = 20391300. Its totient is φ = 20347648.

The previous prime is 20369429. The next prime is 20369507. The reversal of 20369473 is 37496302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18948609 + 1420864 = 4353^2 + 1192^2 .

It is a cyclic number.

It is not a de Polignac number, because 20369473 - 2¹³ = 20361281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20369773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9448 + ... + 11401.

It is an arithmetic number, because the mean of its divisors is an integer number (5097825).

Almost surely, 2^20369473 is an apocalyptic number.

It is an amenable number.

20369473 is a deficient number, since it is larger than the sum of its proper divisors (21827).

20369473 is an equidigital number, since it uses as much as digits as its factorization.

20369473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21826.

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 20369473 is about 4513.2552553562. The cubic root of 20369473 is about 273.1030797706.

The spelling of 20369473 in words is "twenty million, three hundred sixty-nine thousand, four hundred seventy-three".