20292317 has 4 divisors (see below), whose sum is σ = 20840796. Its totient is φ = 19743840.

The previous prime is 20292299. The next prime is 20292341. The reversal of 20292317 is 71329202.

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 19456921 + 835396 = 4411^2 + 914^2 .

It is a cyclic number.

It is not a de Polignac number, because 20292317 - 2⁸ = 20292061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20292347) 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, 274184 + ... + 274257.

It is an arithmetic number, because the mean of its divisors is an integer number (5210199).

Almost surely, 2^20292317 is an apocalyptic number.

It is an amenable number.

20292317 is a deficient number, since it is larger than the sum of its proper divisors (548479).

20292317 is an equidigital number, since it uses as much as digits as its factorization.

20292317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548478.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 20292317 is about 4504.6994350345. The cubic root of 20292317 is about 272.7578212481.

The spelling of 20292317 in words is "twenty million, two hundred ninety-two thousand, three hundred seventeen".