20297319 has 12 divisors (see below), whose sum is σ = 31481784. Its totient is φ = 11598384.

The previous prime is 20297317. The next prime is 20297341. The reversal of 20297319 is 91379202.

It is not a de Polignac number, because 20297319 - 2¹ = 20297317 is a prime.

It is a super-2 number, since 2×20297319² = 823962317175522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20297319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20297317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68892 + ... + 69185.

It is an arithmetic number, because the mean of its divisors is an integer number (2623482).

Almost surely, 2^20297319 is an apocalyptic number.

20297319 is a deficient number, since it is larger than the sum of its proper divisors (11184465).

20297319 is a wasteful number, since it uses less digits than its factorization.

20297319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138094 (or 138087 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 20297319 is about 4505.2545987991. The cubic root of 20297319 is about 272.7802307564.

The spelling of 20297319 in words is "twenty million, two hundred ninety-seven thousand, three hundred nineteen".