203873840640 has 240 divisors, whose sum is σ = 712329974928. Its totient is φ = 53884551168.

The previous prime is 203873840623. The next prime is 203873840657. The reversal of 203873840640 is 46048378302.

203873840640 is a `hidden beast` number, since 203 + 8 + 7 + 38 + 406 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (203873840623) and next prime (203873840657).

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2564367 + ... + 2642673.

Almost surely, 2^203873840640 is an apocalyptic number.

203873840640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203873840640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (356164987464).

203873840640 is an abundant number, since it is smaller than the sum of its proper divisors (508456134288).

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

203873840640 is a wasteful number, since it uses less digits than its factorization.

203873840640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78449 (or 78430 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 203873840640 in words is "two hundred three billion, eight hundred seventy-three million, eight hundred forty thousand, six hundred forty".