203990029992 has 192 divisors, whose sum is σ = 689245939200. Its totient is φ = 55215276480.

The previous prime is 203990029979. The next prime is 203990030017. The reversal of 203990029992 is 299920099302.

It is a super-2 number, since 2×203990029992² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 135934 + ... + 653037.

It is an arithmetic number, because the mean of its divisors is an integer number (3589822600).

Almost surely, 2^203990029992 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 203990029992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344622969600).

203990029992 is an abundant number, since it is smaller than the sum of its proper divisors (485255909208).

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

203990029992 is a wasteful number, since it uses less digits than its factorization.

203990029992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789018 (or 789002 counting only the distinct ones).

The product of its (nonzero) digits is 1417176, while the sum is 54.

The spelling of 203990029992 in words is "two hundred three billion, nine hundred ninety million, twenty-nine thousand, nine hundred ninety-two".