20321111010 has 64 divisors (see below), whose sum is σ = 50909783040. Its totient is φ = 5185213440.

The previous prime is 20321111003. The next prime is 20321111053. The reversal of 20321111010 is 1011112302.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39987 + ... + 205526.

It is an arithmetic number, because the mean of its divisors is an integer number (795465360).

Almost surely, 2^20321111010 is an apocalyptic number.

20321111010 is an abundant number, since it is smaller than the sum of its proper divisors (30588672030).

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

20321111010 is a wasteful number, since it uses less digits than its factorization.

20321111010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245643.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 20321111010 its reverse (1011112302), we get a palindrome (21332223312).

The spelling of 20321111010 in words is "twenty billion, three hundred twenty-one million, one hundred eleven thousand, ten".