205440534030 has 32 divisors (see below), whose sum is σ = 493156905984. Its totient is φ = 54773073056.

The previous prime is 205440534029. The next prime is 205440534041. The reversal of 205440534030 is 30435044502.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 540342 + ... + 838361.

It is an arithmetic number, because the mean of its divisors is an integer number (15411153312).

Almost surely, 2^205440534030 is an apocalyptic number.

205440534030 is an abundant number, since it is smaller than the sum of its proper divisors (287716371954).

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

205440534030 is a wasteful number, since it uses less digits than its factorization.

205440534030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383680.

The product of its (nonzero) digits is 28800, while the sum is 30.

Adding to 205440534030 its reverse (30435044502), we get a palindrome (235875578532).

The spelling of 205440534030 in words is "two hundred five billion, four hundred forty million, five hundred thirty-four thousand, thirty".