203738391920 has 80 divisors (see below), whose sum is σ = 546618109440. Its totient is φ = 69174957312.

The previous prime is 203738391889. The next prime is 203738392001. The reversal of 203738391920 is 29193837302.

203738391920 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1708430 + ... + 1823789.

It is an arithmetic number, because the mean of its divisors is an integer number (6832726368).

Almost surely, 2^203738391920 is an apocalyptic number.

203738391920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203738391920 is an abundant number, since it is smaller than the sum of its proper divisors (342879717520).

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

203738391920 is a wasteful number, since it uses less digits than its factorization.

203738391920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3532342 (or 3532336 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 47.

The spelling of 203738391920 in words is "two hundred three billion, seven hundred thirty-eight million, three hundred ninety-one thousand, nine hundred twenty".