20312131450 has 192 divisors, whose sum is σ = 45757071360. Its totient is φ = 6634172160.

The previous prime is 20312131429. The next prime is 20312131451. The reversal of 20312131450 is 5413121302.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20312131451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12213319 + ... + 12214981.

It is an arithmetic number, because the mean of its divisors is an integer number (238318080).

Almost surely, 2^20312131450 is an apocalyptic number.

20312131450 is an abundant number, since it is smaller than the sum of its proper divisors (25444939910).

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

20312131450 is a wasteful number, since it uses less digits than its factorization.

20312131450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773 (or 1768 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 20312131450 its reverse (5413121302), we get a palindrome (25725252752).

The spelling of 20312131450 in words is "twenty billion, three hundred twelve million, one hundred thirty-one thousand, four hundred fifty".