20405132124350 has 12 divisors (see below), whose sum is σ = 37953545751384. Its totient is φ = 8162052849720.

The previous prime is 20405132124323. The next prime is 20405132124367. The reversal of 20405132124350 is 5342123150402.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 204051321194 + ... + 204051321293.

It is an arithmetic number, because the mean of its divisors is an integer number (3162795479282).

Almost surely, 2^{20405132124350} is an apocalyptic number.

20405132124350 is a deficient number, since it is larger than the sum of its proper divisors (17548413627034).

20405132124350 is a wasteful number, since it uses less digits than its factorization.

20405132124350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408102642499 (or 408102642494 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 20405132124350 its reverse (5342123150402), we get a palindrome (25747255274752).

The spelling of 20405132124350 in words is "twenty trillion, four hundred five billion, one hundred thirty-two million, one hundred twenty-four thousand, three hundred fifty".