20042984 has 24 divisors (see below), whose sum is σ = 40563810. Its totient is φ = 9229536.

The previous prime is 20042951. The next prime is 20042993. The reversal of 20042984 is 48924002.

It can be written as a sum of positive squares in only one way, i.e., 19272100 + 770884 = 4390^2 + 878^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45437 + ... + 45875.

Almost surely, 2^20042984 is an apocalyptic number.

It is an amenable number.

20042984 is an abundant number, since it is smaller than the sum of its proper divisors (20520826).

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

20042984 is an equidigital number, since it uses as much as digits as its factorization.

20042984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897 (or 454 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 20042984 is about 4476.9391329345. The cubic root of 20042984 is about 271.6360833919.

Adding to 20042984 its reverse (48924002), we get a palindrome (68966986).

The spelling of 20042984 in words is "twenty million, forty-two thousand, nine hundred eighty-four".