20303221311032 has 64 divisors (see below), whose sum is σ = 42168230121600. Its totient is φ = 9086880781440.

The previous prime is 20303221310993. The next prime is 20303221311041. The reversal of 20303221311032 is 23011312230302.

It is a junction number, because it is equal to n+sod(n) for n = 20303221310989 and 20303221311007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12269819 + ... + 13825877.

It is an arithmetic number, because the mean of its divisors is an integer number (658878595650).

Almost surely, 2^{20303221311032} is an apocalyptic number.

20303221311032 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20303221311032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21084115060800).

20303221311032 is an abundant number, since it is smaller than the sum of its proper divisors (21865008810568).

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

20303221311032 is a wasteful number, since it uses less digits than its factorization.

20303221311032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558356 (or 1558352 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 20303221311032 its reverse (23011312230302), we get a palindrome (43314533541334).

The spelling of 20303221311032 in words is "twenty trillion, three hundred three billion, two hundred twenty-one million, three hundred eleven thousand, thirty-two".