20146456 has 32 divisors (see below), whose sum is σ = 42094080. Its totient is φ = 8960800.

The previous prime is 20146453. The next prime is 20146471. The reversal of 20146456 is 65464102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20146453) 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 7 ways as a sum of consecutive naturals, for example, 1701 + ... + 6571.

It is an arithmetic number, because the mean of its divisors is an integer number (1315440).

Almost surely, 2^20146456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20146456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21047040).

20146456 is an abundant number, since it is smaller than the sum of its proper divisors (21947624).

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

20146456 is a wasteful number, since it uses less digits than its factorization.

20146456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4935 (or 4931 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 20146456 is about 4488.4803664492. The cubic root of 20146456 is about 272.1027221589.

It can be divided in two parts, 20146 and 456, that added together give a palindrome (20602).

The spelling of 20146456 in words is "twenty million, one hundred forty-six thousand, four hundred fifty-six".