20401033311 has 12 divisors (see below), whose sum is σ = 31201580592. Its totient is φ = 12800648256.

The previous prime is 20401033297. The next prime is 20401033313. The reversal of 20401033311 is 11333010402.

It is not a de Polignac number, because 20401033311 - 2¹³ = 20401025119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401033313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66669891 + ... + 66670196.

It is an arithmetic number, because the mean of its divisors is an integer number (2600131716).

Almost surely, 2^20401033311 is an apocalyptic number.

20401033311 is a deficient number, since it is larger than the sum of its proper divisors (10800547281).

20401033311 is a wasteful number, since it uses less digits than its factorization.

20401033311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133340110 (or 133340107 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20401033311 its reverse (11333010402), we get a palindrome (31734043713).

The spelling of 20401033311 in words is "twenty billion, four hundred one million, thirty-three thousand, three hundred eleven".