20045960 has 64 divisors (see below), whose sum is σ = 50932800. Its totient is φ = 7033600.

The previous prime is 20045957. The next prime is 20045981. The reversal of 20045960 is 6954002.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11975 + ... + 13545.

It is an arithmetic number, because the mean of its divisors is an integer number (795825).

Almost surely, 2^20045960 is an apocalyptic number.

20045960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20045960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25466400).

20045960 is an abundant number, since it is smaller than the sum of its proper divisors (30886840).

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

20045960 is a wasteful number, since it uses less digits than its factorization.

20045960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622 (or 1618 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 20045960 is about 4477.2714905397. The cubic root of 20045960 is about 271.6495269819.

Adding to 20045960 its reverse (6954002), we get a palindrome (26999962).

The spelling of 20045960 in words is "twenty million, forty-five thousand, nine hundred sixty".