20801932 has 12 divisors (see below), whose sum is σ = 37658880. Its totient is φ = 10042256.

The previous prime is 20801929. The next prime is 20801933. The reversal of 20801932 is 23910802.

It is a junction number, because it is equal to n+sod(n) for n = 20801897 and 20801906.

It is not an unprimeable number, because it can be changed into a prime (20801933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89548 + ... + 89779.

It is an arithmetic number, because the mean of its divisors is an integer number (3138240).

Almost surely, 2^20801932 is an apocalyptic number.

It is an amenable number.

20801932 is a deficient number, since it is larger than the sum of its proper divisors (16856948).

20801932 is a wasteful number, since it uses less digits than its factorization.

20801932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179360 (or 179358 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 20801932 is about 4560.9135049900. The cubic root of 20801932 is about 275.0222880007.

The spelling of 20801932 in words is "twenty million, eight hundred one thousand, nine hundred thirty-two".