20505892 has 12 divisors (see below), whose sum is σ = 39147696. Its totient is φ = 9320840.

The previous prime is 20505887. The next prime is 20505917. The reversal of 20505892 is 29850502.

It is a happy 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, 232978 + ... + 233065.

It is an arithmetic number, because the mean of its divisors is an integer number (3262308).

Almost surely, 2^20505892 is an apocalyptic number.

20505892 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20505892 is a deficient number, since it is larger than the sum of its proper divisors (18641804).

20505892 is a wasteful number, since it uses less digits than its factorization.

20505892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466058 (or 466056 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 20505892 is about 4528.3431848746. The cubic root of 20505892 is about 273.7114016039.

The spelling of 20505892 in words is "twenty million, five hundred five thousand, eight hundred ninety-two".