19550953920 has 224 divisors, whose sum is σ = 64125262656. Its totient is φ = 5042995200.

The previous prime is 19550953907. The next prime is 19550953949. The reversal of 19550953920 is 2935905591.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

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 19550953920.

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, 6427600 + ... + 6430640.

It is an arithmetic number, because the mean of its divisors is an integer number (286273494).

Almost surely, 2^19550953920 is an apocalyptic number.

19550953920 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 19550953920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32062631328).

19550953920 is an abundant number, since it is smaller than the sum of its proper divisors (44574308736).

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

19550953920 is a wasteful number, since it uses less digits than its factorization.

19550953920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3279 (or 3269 counting only the distinct ones).

The product of its (nonzero) digits is 546750, while the sum is 48.

The spelling of 19550953920 in words is "nineteen billion, five hundred fifty million, nine hundred fifty-three thousand, nine hundred twenty".