1908538364920 has 256 divisors, whose sum is σ = 4857034752000. Its totient is φ = 669045312000.

The previous prime is 1908538364867. The next prime is 1908538364923. The reversal of 1908538364920 is 294638358091.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1908538364923) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 309673759 + ... + 309679921.

It is an arithmetic number, because the mean of its divisors is an integer number (18972792000).

Almost surely, 2^{1908538364920} is an apocalyptic number.

1908538364920 is a gapful number since it is divisible by the number (10) 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 1908538364920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2428517376000).

1908538364920 is an abundant number, since it is smaller than the sum of its proper divisors (2948496387080).

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

1908538364920 is a wasteful number, since it uses less digits than its factorization.

1908538364920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6474 (or 6470 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 58.

The spelling of 1908538364920 in words is "one trillion, nine hundred eight billion, five hundred thirty-eight million, three hundred sixty-four thousand, nine hundred twenty".