20383581900 has 288 divisors, whose sum is σ = 69915525120. Its totient is φ = 4529952000.

The previous prime is 20383581781. The next prime is 20383581937. The reversal of 20383581900 is 918538302.

It is a super-2 number, since 2×20383581900² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1938457 + ... + 1948943.

It is an arithmetic number, because the mean of its divisors is an integer number (242762240).

Almost surely, 2^20383581900 is an apocalyptic number.

20383581900 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 20383581900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34957762560).

20383581900 is an abundant number, since it is smaller than the sum of its proper divisors (49531943220).

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

20383581900 is a wasteful number, since it uses less digits than its factorization.

20383581900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10565 (or 10558 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 20383581900 in words is "twenty billion, three hundred eighty-three million, five hundred eighty-one thousand, nine hundred".