1923903505920 has 320 divisors, whose sum is σ = 6771201972480. Its totient is φ = 462119731200.

The previous prime is 1923903505913. The next prime is 1923903505943. The reversal of 1923903505920 is 295053093291.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1923903505920.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9103855 + ... + 9312785.

It is an arithmetic number, because the mean of its divisors is an integer number (21160006164).

Almost surely, 2^{1923903505920} is an apocalyptic number.

1923903505920 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 1923903505920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3385600986240).

1923903505920 is an abundant number, since it is smaller than the sum of its proper divisors (4847298466560).

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

1923903505920 is a wasteful number, since it uses less digits than its factorization.

1923903505920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209077 (or 209061 counting only the distinct ones).

The product of its (nonzero) digits is 656100, while the sum is 48.

The spelling of 1923903505920 in words is "one trillion, nine hundred twenty-three billion, nine hundred three million, five hundred five thousand, nine hundred twenty".