20009899800000 has 840 divisors, whose sum is σ = 80880468474960. Its totient is φ = 4850841600000.

The previous prime is 20009899799941. The next prime is 20009899800001. The reversal of 20009899800000 is 899890002.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20009899800001) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 178143856 + ... + 178256144.

It is an arithmetic number, because the mean of its divisors is an integer number (96286271994).

Almost surely, 2^{20009899800000} is an apocalyptic number.

20009899800000 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 20009899800000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40440234237480).

20009899800000 is an abundant number, since it is smaller than the sum of its proper divisors (60870568674960).

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

20009899800000 is an equidigital number, since it uses as much as digits as its factorization.

20009899800000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112349 (or 112310 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

It can be divided in two parts, 20009 and 899800000, that added together give a square (899820009 = 29997²).

The spelling of 20009899800000 in words is "twenty trillion, nine billion, eight hundred ninety-nine million, eight hundred thousand".