205017692380 has 12 divisors (see below), whose sum is σ = 430537154040. Its totient is φ = 82007076944.

The previous prime is 205017692339. The next prime is 205017692387. The reversal of 205017692380 is 83296710502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205017692387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5125442290 + ... + 5125442329.

It is an arithmetic number, because the mean of its divisors is an integer number (35878096170).

Almost surely, 2^205017692380 is an apocalyptic number.

205017692380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205017692380 is an abundant number, since it is smaller than the sum of its proper divisors (225519461660).

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

205017692380 is a wasteful number, since it uses less digits than its factorization.

205017692380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10250884628 (or 10250884626 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 205017692380 in words is "two hundred five billion, seventeen million, six hundred ninety-two thousand, three hundred eighty".