20243992 has 16 divisors (see below), whose sum is σ = 39182400. Its totient is φ = 9795360.

The previous prime is 20243989. The next prime is 20244041. The reversal of 20243992 is 29934202.

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 40567 + ... + 41062.

It is an arithmetic number, because the mean of its divisors is an integer number (2448900).

Almost surely, 2^20243992 is an apocalyptic number.

It is an amenable number.

20243992 is a deficient number, since it is larger than the sum of its proper divisors (18938408).

20243992 is a wasteful number, since it uses less digits than its factorization.

20243992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81666 (or 81662 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 20243992 is about 4499.3323949226. The cubic root of 20243992 is about 272.5411300597.

The spelling of 20243992 in words is "twenty million, two hundred forty-three thousand, nine hundred ninety-two".