20431421512152 has 128 divisors (see below), whose sum is σ = 58642326812160. Its totient is φ = 5810879278080.

The previous prime is 20431421512123. The next prime is 20431421512169. The reversal of 20431421512152 is 25121512413402.

It is a super-2 number, since 2×20431421512152² (a number of 27 digits) contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 144409798 + ... + 144551210.

It is an arithmetic number, because the mean of its divisors is an integer number (458143178220).

Almost surely, 2^{20431421512152} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20431421512152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29321163406080).

20431421512152 is an abundant number, since it is smaller than the sum of its proper divisors (38210905300008).

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

20431421512152 is a wasteful number, since it uses less digits than its factorization.

20431421512152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145353 (or 145349 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

Adding to 20431421512152 its reverse (25121512413402), we get a palindrome (45552933925554).

The spelling of 20431421512152 in words is "twenty trillion, four hundred thirty-one billion, four hundred twenty-one million, five hundred twelve thousand, one hundred fifty-two".