20331212221394 has 32 divisors (see below), whose sum is σ = 34071384715200. Its totient is φ = 9042437099520.

The previous prime is 20331212221393. The next prime is 20331212221423. The reversal of 20331212221394 is 49312221213302.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20331212221393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37285967 + ... + 37827314.

It is an arithmetic number, because the mean of its divisors is an integer number (1064730772350).

Almost surely, 2^{20331212221394} is an apocalyptic number.

20331212221394 is a deficient number, since it is larger than the sum of its proper divisors (13740172493806).

20331212221394 is a wasteful number, since it uses less digits than its factorization.

20331212221394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75113738.

The product of its (nonzero) digits is 31104, while the sum is 35.

Adding to 20331212221394 its reverse (49312221213302), we get a palindrome (69643433434696).

The spelling of 20331212221394 in words is "twenty trillion, three hundred thirty-one billion, two hundred twelve million, two hundred twenty-one thousand, three hundred ninety-four".