20463259 has 4 divisors (see below), whose sum is σ = 20475504. Its totient is φ = 20451016.

The previous prime is 20463251. The next prime is 20463269. The reversal of 20463259 is 95236402.

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

It is a cyclic number.

It is not a de Polignac number, because 20463259 - 2³ = 20463251 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20463259.

It is not an unprimeable number, because it can be changed into a prime (20463251) 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, 3127 + ... + 7120.

It is an arithmetic number, because the mean of its divisors is an integer number (5118876).

Almost surely, 2^20463259 is an apocalyptic number.

20463259 is a deficient number, since it is larger than the sum of its proper divisors (12245).

20463259 is a wasteful number, since it uses less digits than its factorization.

20463259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12244.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 20463259 is about 4523.6333847915. The cubic root of 20463259 is about 273.5215824292.

The spelling of 20463259 in words is "twenty million, four hundred sixty-three thousand, two hundred fifty-nine".