205030112240 has 20 divisors (see below), whose sum is σ = 476695011144. Its totient is φ = 82012044864.

The previous prime is 205030112219. The next prime is 205030112257. The reversal of 205030112240 is 42211030502.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1281438122 + ... + 1281438281.

Almost surely, 2^205030112240 is an apocalyptic number.

205030112240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205030112240 is an abundant number, since it is smaller than the sum of its proper divisors (271664898904).

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

205030112240 is a wasteful number, since it uses less digits than its factorization.

205030112240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562876416 (or 2562876410 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 205030112240 its reverse (42211030502), we get a palindrome (247241142742).

The spelling of 205030112240 in words is "two hundred five billion, thirty million, one hundred twelve thousand, two hundred forty".