20195073646500 has 192 divisors, whose sum is σ = 60349167470592. Its totient is φ = 5244947568000.

The previous prime is 20195073646453. The next prime is 20195073646513. The reversal of 20195073646500 is 564637059102.

It is a self number, because there is not a number n which added to its sum of digits gives 20195073646500.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21930345 + ... + 22832655.

It is an arithmetic number, because the mean of its divisors is an integer number (314318580576).

Almost surely, 2^{20195073646500} is an apocalyptic number.

20195073646500 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 20195073646500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30174583735296).

20195073646500 is an abundant number, since it is smaller than the sum of its proper divisors (40154093824092).

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

20195073646500 is a wasteful number, since it uses less digits than its factorization.

20195073646500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902723 (or 902711 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 48.

The spelling of 20195073646500 in words is "twenty trillion, one hundred ninety-five billion, seventy-three million, six hundred forty-six thousand, five hundred".