20268359 has 4 divisors (see below), whose sum is σ = 21149616. Its totient is φ = 19387104.

The previous prime is 20268331. The next prime is 20268373. The reversal of 20268359 is 95386202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95386202 = 2 ⋅47693101.

It is a cyclic number.

It is not a de Polignac number, because 20268359 - 2¹² = 20264263 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 (20268379) 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, 440594 + ... + 440639.

It is an arithmetic number, because the mean of its divisors is an integer number (5287404).

Almost surely, 2^20268359 is an apocalyptic number.

20268359 is a deficient number, since it is larger than the sum of its proper divisors (881257).

20268359 is an equidigital number, since it uses as much as digits as its factorization.

20268359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881256.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 20268359 is about 4502.0394267487. The cubic root of 20268359 is about 272.6504356910.

The spelling of 20268359 in words is "twenty million, two hundred sixty-eight thousand, three hundred fifty-nine".