20321111020 has 48 divisors (see below), whose sum is σ = 49244203008. Its totient is φ = 6899590080.

The previous prime is 20321111003. The next prime is 20321111053. The reversal of 20321111020 is 2011112302.

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, 690196 + ... + 719035.

It is an arithmetic number, because the mean of its divisors is an integer number (1025920896).

Almost surely, 2^20321111020 is an apocalyptic number.

20321111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20321111020 is an abundant number, since it is smaller than the sum of its proper divisors (28923091988).

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

20321111020 is a wasteful number, since it uses less digits than its factorization.

20321111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1409350 (or 1409348 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20321111020 its reverse (2011112302), we get a palindrome (22332223322).

The spelling of 20321111020 in words is "twenty billion, three hundred twenty-one million, one hundred eleven thousand, twenty".