20491292 has 12 divisors (see below), whose sum is σ = 35945616. Its totient is φ = 10221120.

The previous prime is 20491283. The next prime is 20491301. The reversal of 20491292 is 29219402.

It is an interprime number because it is at equal distance from previous prime (20491283) and next prime (20491301).

It is a congruent number.

It is an unprimeable number.

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, 4184 + ... + 7647.

It is an arithmetic number, because the mean of its divisors is an integer number (2995468).

Almost surely, 2^20491292 is an apocalyptic number.

It is an amenable number.

20491292 is a deficient number, since it is larger than the sum of its proper divisors (15454324).

20491292 is a wasteful number, since it uses less digits than its factorization.

20491292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12268 (or 12266 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 20491292 is about 4526.7308291967. The cubic root of 20491292 is about 273.6464262096.

The spelling of 20491292 in words is "twenty million, four hundred ninety-one thousand, two hundred ninety-two".