205550132340 has 72 divisors (see below), whose sum is σ = 669506154912. Its totient is φ = 46982886720.

The previous prime is 205550132329. The next prime is 205550132351. The reversal of 205550132340 is 43231055502.

It is an interprime number because it is at equal distance from previous prime (205550132329) and next prime (205550132351).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 205550132298 and 205550132307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34954566 + ... + 34960445.

It is an arithmetic number, because the mean of its divisors is an integer number (9298696596).

Almost surely, 2^205550132340 is an apocalyptic number.

205550132340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205550132340 is an abundant number, since it is smaller than the sum of its proper divisors (463956022572).

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

205550132340 is a wasteful number, since it uses less digits than its factorization.

205550132340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69915037 (or 69915028 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

Adding to 205550132340 its reverse (43231055502), we get a palindrome (248781187842).

The spelling of 205550132340 in words is "two hundred five billion, five hundred fifty million, one hundred thirty-two thousand, three hundred forty".