20001332111 has 8 divisors (see below), whose sum is σ = 20343724560. Its totient is φ = 19659052672.

The previous prime is 20001332089. The next prime is 20001332179. The reversal of 20001332111 is 11123310002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20001332111 - 2¹⁴ = 20001315727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001332191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378341 + ... + 427953.

It is an arithmetic number, because the mean of its divisors is an integer number (2542965570).

Almost surely, 2^20001332111 is an apocalyptic number.

20001332111 is a deficient number, since it is larger than the sum of its proper divisors (342392449).

20001332111 is an equidigital number, since it uses as much as digits as its factorization.

20001332111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56505.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 20001332111 its reverse (11123310002), we get a palindrome (31124642113).

The spelling of 20001332111 in words is "twenty billion, one million, three hundred thirty-two thousand, one hundred eleven".