20007732 has 12 divisors (see below), whose sum is σ = 46684736. Its totient is φ = 6669240.

The previous prime is 20007721. The next prime is 20007737. The reversal of 20007732 is 23770002.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 20007699 and 20007708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20007737) 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 3 ways as a sum of consecutive naturals, for example, 833644 + ... + 833667.

Almost surely, 2^20007732 is an apocalyptic number.

It is an amenable number.

20007732 is an abundant number, since it is smaller than the sum of its proper divisors (26677004).

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

20007732 is a wasteful number, since it uses less digits than its factorization.

20007732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667318 (or 1667316 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 21.

The square root of 20007732 is about 4473.0003353454. Note that the first 3 decimals coincide. The cubic root of 20007732 is about 271.4767369477.

Adding to 20007732 its reverse (23770002), we get a palindrome (43777734).

The spelling of 20007732 in words is "twenty million, seven thousand, seven hundred thirty-two".