20045080 has 32 divisors (see below), whose sum is σ = 49202640. Its totient is φ = 7288960.

The previous prime is 20045063. The next prime is 20045087. The reversal of 20045080 is 8054002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22339 + ... + 23218.

Almost surely, 2^20045080 is an apocalyptic number.

20045080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20045080 is an abundant number, since it is smaller than the sum of its proper divisors (29157560).

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

20045080 is a wasteful number, since it uses less digits than its factorization.

20045080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45579 (or 45575 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 20045080 is about 4477.1732153224. The cubic root of 20045080 is about 271.6455518653.

Adding to 20045080 its reverse (8054002), we get a palindrome (28099082).

The spelling of 20045080 in words is "twenty million, forty-five thousand, eighty".