20491832 has 16 divisors (see below), whose sum is σ = 38819760. Its totient is φ = 10139904.

The previous prime is 20491829. The next prime is 20491843. The reversal of 20491832 is 23819402.

It is a junction number, because it is equal to n+sod(n) for n = 20491795 and 20491804.

It is a congruent number.

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, 12428 + ... + 13979.

It is an arithmetic number, because the mean of its divisors is an integer number (2426235).

Almost surely, 2^20491832 is an apocalyptic number.

It is an amenable number.

20491832 is a deficient number, since it is larger than the sum of its proper divisors (18327928).

20491832 is a wasteful number, since it uses less digits than its factorization.

20491832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26510 (or 26506 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 20491832 is about 4526.7904744974. The cubic root of 20491832 is about 273.6488299587.

The spelling of 20491832 in words is "twenty million, four hundred ninety-one thousand, eight hundred thirty-two".