20100331992 has 128 divisors (see below), whose sum is σ = 55671033600. Its totient is φ = 6007592448.

The previous prime is 20100331981. The next prime is 20100332023. The reversal of 20100331992 is 29913300102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9915283 + ... + 9917309.

It is an arithmetic number, because the mean of its divisors is an integer number (434929950).

Almost surely, 2^20100331992 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 20100331992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27835516800).

20100331992 is an abundant number, since it is smaller than the sum of its proper divisors (35570701608).

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

20100331992 is a wasteful number, since it uses less digits than its factorization.

20100331992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2945 (or 2941 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 30.

The spelling of 20100331992 in words is "twenty billion, one hundred million, three hundred thirty-one thousand, nine hundred ninety-two".