20871932 has 12 divisors (see below), whose sum is σ = 36558480. Its totient is φ = 10426656.

The previous prime is 20871923. The next prime is 20871973. The reversal of 20871932 is 23917802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6128 + ... + 8904.

It is an arithmetic number, because the mean of its divisors is an integer number (3046540).

Almost surely, 2^20871932 is an apocalyptic number.

It is an amenable number.

20871932 is a deficient number, since it is larger than the sum of its proper divisors (15686548).

20871932 is a wasteful number, since it uses less digits than its factorization.

20871932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4660 (or 4658 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 20871932 is about 4568.5809613052. The cubic root of 20871932 is about 275.3304325542.

The spelling of 20871932 in words is "twenty million, eight hundred seventy-one thousand, nine hundred thirty-two".