20491932 has 24 divisors (see below), whose sum is σ = 49107856. Its totient is φ = 6645888.

The previous prime is 20491909. The next prime is 20491957. The reversal of 20491932 is 23919402.

It is a self number, because there is not a number n which added to its sum of digits gives 20491932.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 22633 + ... + 23520.

Almost surely, 2^20491932 is an apocalyptic number.

It is an amenable number.

20491932 is an abundant number, since it is smaller than the sum of its proper divisors (28615924).

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

20491932 is a wasteful number, since it uses less digits than its factorization.

20491932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46197 (or 46195 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 20491932 is about 4526.8015198372. The cubic root of 20491932 is about 273.6492750928.

The spelling of 20491932 in words is "twenty million, four hundred ninety-one thousand, nine hundred thirty-two".