20099500380 has 480 divisors, whose sum is σ = 69336368640. Its totient is φ = 4859688960.

The previous prime is 20099500373. The next prime is 20099500423. The reversal of 20099500380 is 8300599002.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 53885874 + ... + 53886246.

It is an arithmetic number, because the mean of its divisors is an integer number (144450768).

Almost surely, 2^20099500380 is an apocalyptic number.

20099500380 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 20099500380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34668184320).

20099500380 is an abundant number, since it is smaller than the sum of its proper divisors (49236868260).

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

20099500380 is a wasteful number, since it uses less digits than its factorization.

20099500380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The spelling of 20099500380 in words is "twenty billion, ninety-nine million, five hundred thousand, three hundred eighty".