20031871825 has 48 divisors (see below), whose sum is σ = 28663165440. Its totient is φ = 13603680000.

The previous prime is 20031871813. The next prime is 20031871837. The reversal of 20031871825 is 52817813002.

It is an interprime number because it is at equal distance from previous prime (20031871813) and next prime (20031871837).

It is not a de Polignac number, because 20031871825 - 2¹⁷ = 20031740753 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8519400 + ... + 8521750.

It is an arithmetic number, because the mean of its divisors is an integer number (597149280).

Almost surely, 2^20031871825 is an apocalyptic number.

20031871825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20031871825 is a deficient number, since it is larger than the sum of its proper divisors (8631293615).

20031871825 is a wasteful number, since it uses less digits than its factorization.

20031871825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2818 (or 2813 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The spelling of 20031871825 in words is "twenty billion, thirty-one million, eight hundred seventy-one thousand, eight hundred twenty-five".