20259393 has 72 divisors (see below), whose sum is σ = 37116576. Its totient is φ = 9757440.

The previous prime is 20259373. The next prime is 20259413. The reversal of 20259393 is 39395202.

It is an interprime number because it is at equal distance from previous prime (20259373) and next prime (20259413).

It is not a de Polignac number, because 20259393 - 2¹⁰ = 20258369 is a prime.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20259373) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 302346 + ... + 302412.

It is an arithmetic number, because the mean of its divisors is an integer number (515508).

Almost surely, 2^20259393 is an apocalyptic number.

It is an amenable number.

20259393 is a deficient number, since it is larger than the sum of its proper divisors (16857183).

20259393 is a wasteful number, since it uses less digits than its factorization.

20259393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 33.

The square root of 20259393 is about 4501.0435456680. The cubic root of 20259393 is about 272.6102261480.

It can be divided in two parts, 202 and 59393, that added together give a palindrome (59595).

The spelling of 20259393 in words is "twenty million, two hundred fifty-nine thousand, three hundred ninety-three".