20258878 has 8 divisors (see below), whose sum is σ = 31436280. Its totient is φ = 9780120.

The previous prime is 20258873. The next prime is 20258897. The reversal of 20258878 is 87885202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20258878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20258873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174588 + ... + 174703.

It is an arithmetic number, because the mean of its divisors is an integer number (3929535).

Almost surely, 2^20258878 is an apocalyptic number.

20258878 is a deficient number, since it is larger than the sum of its proper divisors (11177402).

20258878 is a wasteful number, since it uses less digits than its factorization.

20258878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349322.

The product of its (nonzero) digits is 71680, while the sum is 40.

The square root of 20258878 is about 4500.9863363490. The cubic root of 20258878 is about 272.6079161831.

The spelling of 20258878 in words is "twenty million, two hundred fifty-eight thousand, eight hundred seventy-eight".