20252154 has 16 divisors (see below), whose sum is σ = 43620192. Its totient is φ = 6231408.

The previous prime is 20252149. The next prime is 20252173. The reversal of 20252154 is 45125202.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20252154.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129744 + ... + 129899.

It is an arithmetic number, because the mean of its divisors is an integer number (2726262).

Almost surely, 2^20252154 is an apocalyptic number.

20252154 is an abundant number, since it is smaller than the sum of its proper divisors (23368038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20252154 is a wasteful number, since it uses less digits than its factorization.

20252154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259661.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 20252154 is about 4500.2393269692. The cubic root of 20252154 is about 272.5777529717.

Adding to 20252154 its reverse (45125202), we get a palindrome (65377356).

The spelling of 20252154 in words is "twenty million, two hundred fifty-two thousand, one hundred fifty-four".