20031892 has 12 divisors (see below), whose sum is σ = 35188020. Its totient is φ = 9978176.

The previous prime is 20031883. The next prime is 20031901. The reversal of 20031892 is 29813002.

It is an interprime number because it is at equal distance from previous prime (20031883) and next prime (20031901).

It can be written as a sum of positive squares in 2 ways, for example, as 10995856 + 9036036 = 3316^2 + 3006^2 .

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, 8233 + ... + 10384.

It is an arithmetic number, because the mean of its divisors is an integer number (2932335).

Almost surely, 2^20031892 is an apocalyptic number.

It is an amenable number.

20031892 is a deficient number, since it is larger than the sum of its proper divisors (15156128).

20031892 is a wasteful number, since it uses less digits than its factorization.

20031892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18890 (or 18888 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 20031892 is about 4475.7001686887. The cubic root of 20031892 is about 271.5859653819.

Adding to 20031892 its reverse (29813002), we get a palindrome (49844894).

The spelling of 20031892 in words is "twenty million, thirty-one thousand, eight hundred ninety-two".