205402532430040 has 32 divisors (see below), whose sum is σ = 504169852329360. Its totient is φ = 74691829974400.

The previous prime is 205402532429987. The next prime is 205402532430079. The reversal of 205402532430040 is 40034235204502.

It is a junction number, because it is equal to n+sod(n) for n = 205402532429978 and 205402532430005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233411968231 + ... + 233411969110.

Almost surely, 2^{205402532430040} is an apocalyptic number.

205402532430040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205402532430040 is an abundant number, since it is smaller than the sum of its proper divisors (298767319899320).

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

205402532430040 is a wasteful number, since it uses less digits than its factorization.

205402532430040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466823937363 (or 466823937359 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 34.

Adding to 205402532430040 its reverse (40034235204502), we get a palindrome (245436767634542).

The spelling of 205402532430040 in words is "two hundred five trillion, four hundred two billion, five hundred thirty-two million, four hundred thirty thousand, forty".