20091750380 has 96 divisors (see below), whose sum is σ = 46982799360. Its totient is φ = 7167133440.

The previous prime is 20091750347. The next prime is 20091750409. The reversal of 20091750380 is 8305719002.

It is a self number, because there is not a number n which added to its sum of digits gives 20091750380.

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, 5793407 + ... + 5796873.

It is an arithmetic number, because the mean of its divisors is an integer number (489404160).

Almost surely, 2^20091750380 is an apocalyptic number.

20091750380 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 20091750380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23491399680).

20091750380 is an abundant number, since it is smaller than the sum of its proper divisors (26891048980).

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

20091750380 is a wasteful number, since it uses less digits than its factorization.

20091750380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4239 (or 4237 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The spelling of 20091750380 in words is "twenty billion, ninety-one million, seven hundred fifty thousand, three hundred eighty".