20500440432424 has 32 divisors (see below), whose sum is σ = 39089591392320. Its totient is φ = 10077157702656.

The previous prime is 20500440432397. The next prime is 20500440432473. The reversal of 20500440432424 is 42423404400502.

It is a super-3 number, since 3×20500440432424³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 20500440432424.

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, 37749369 + ... + 38288584.

It is an arithmetic number, because the mean of its divisors is an integer number (1221549731010).

Almost surely, 2^{20500440432424} is an apocalyptic number.

It is an amenable number.

20500440432424 is a deficient number, since it is larger than the sum of its proper divisors (18589150959896).

20500440432424 is a wasteful number, since it uses less digits than its factorization.

20500440432424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76038529 (or 76038525 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 34.

Adding to 20500440432424 its reverse (42423404400502), we get a palindrome (62923844832926).

The spelling of 20500440432424 in words is "twenty trillion, five hundred billion, four hundred forty million, four hundred thirty-two thousand, four hundred twenty-four".