209703380190 has 96 divisors (see below), whose sum is σ = 544127655456. Its totient is φ = 51685447680.

The previous prime is 209703380143. The next prime is 209703380197. The reversal of 209703380190 is 91083307902.

It is a super-2 number, since 2×209703380190² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209703380197) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 207894 + ... + 680166.

It is an arithmetic number, because the mean of its divisors is an integer number (5667996411).

Almost surely, 2^209703380190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209703380190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272063827728).

209703380190 is an abundant number, since it is smaller than the sum of its proper divisors (334424275266).

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

209703380190 is a wasteful number, since it uses less digits than its factorization.

209703380190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472362 (or 472343 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The spelling of 209703380190 in words is "two hundred nine billion, seven hundred three million, three hundred eighty thousand, one hundred ninety".