20007984 has 20 divisors (see below), whose sum is σ = 51687416. Its totient is φ = 6669312.

The previous prime is 20007979. The next prime is 20008019. The reversal of 20007984 is 48970002.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208369 + ... + 208464.

Almost surely, 2^20007984 is an apocalyptic number.

20007984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20007984 is an abundant number, since it is smaller than the sum of its proper divisors (31679432).

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

20007984 is a wasteful number, since it uses less digits than its factorization.

20007984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416844 (or 416838 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 20007984 is about 4473.0285042687. The cubic root of 20007984 is about 271.4778767046.

Adding to 20007984 its reverse (48970002), we get a palindrome (68977986).

The spelling of 20007984 in words is "twenty million, seven thousand, nine hundred eighty-four".