20203992 has 96 divisors (see below), whose sum is σ = 59841600. Its totient is φ = 6368544.

The previous prime is 20203969. The next prime is 20204003. The reversal of 20203992 is 29930202.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 23 ways as a sum of consecutive naturals, for example, 36663 + ... + 37209.

It is an arithmetic number, because the mean of its divisors is an integer number (623350).

Almost surely, 2^20203992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20203992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29920800).

20203992 is an abundant number, since it is smaller than the sum of its proper divisors (39637608).

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

20203992 is a wasteful number, since it uses less digits than its factorization.

20203992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587 (or 571 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 20203992 is about 4494.8850930808. The cubic root of 20203992 is about 272.3615074954.

The spelling of 20203992 in words is "twenty million, two hundred three thousand, nine hundred ninety-two".