20291383900 has 72 divisors (see below), whose sum is σ = 44925405840. Its totient is φ = 7952355840.

The previous prime is 20291383883. The next prime is 20291383921. The reversal of 20291383900 is 938319202.

It is a self number, because there is not a number n which added to its sum of digits gives 20291383900.

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, 4550472 + ... + 4554928.

It is an arithmetic number, because the mean of its divisors is an integer number (623963970).

Almost surely, 2^20291383900 is an apocalyptic number.

20291383900 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 20291383900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22462702920).

20291383900 is an abundant number, since it is smaller than the sum of its proper divisors (24634021940).

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

20291383900 is a wasteful number, since it uses less digits than its factorization.

20291383900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5383 (or 5376 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 20291383900 in words is "twenty billion, two hundred ninety-one million, three hundred eighty-three thousand, nine hundred".