20431232501400 has 216 divisors, whose sum is σ = 79817320376820. Its totient is φ = 4669995980160.

The previous prime is 20431232501357. The next prime is 20431232501419. The reversal of 20431232501400 is 410523213402.

20431232501400 is a `hidden beast` number, since 2 + 0 + 4 + 3 + 1 + 2 + 3 + 250 + 1 + 400 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 115735114 + ... + 115911513.

Almost surely, 2^{20431232501400} is an apocalyptic number.

20431232501400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20431232501400 is an abundant number, since it is smaller than the sum of its proper divisors (59386087875420).

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

20431232501400 is a wasteful number, since it uses less digits than its factorization.

20431232501400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231646663 (or 231646644 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 20431232501400 its reverse (410523213402), we get a palindrome (20841755714802).

The spelling of 20431232501400 in words is "twenty trillion, four hundred thirty-one billion, two hundred thirty-two million, five hundred one thousand, four hundred".