20401042311 has 24 divisors (see below), whose sum is σ = 33405219120. Its totient is φ = 11893723776.

The previous prime is 20401042241. The next prime is 20401042367. The reversal of 20401042311 is 11324010402.

It is not a de Polignac number, because 20401042311 - 2⁷ = 20401042183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401042381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4586406 + ... + 4590851.

It is an arithmetic number, because the mean of its divisors is an integer number (1391884130).

Almost surely, 2^20401042311 is an apocalyptic number.

20401042311 is a deficient number, since it is larger than the sum of its proper divisors (13004176809).

20401042311 is a wasteful number, since it uses less digits than its factorization.

20401042311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9177295 (or 9177292 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20401042311 its reverse (11324010402), we get a palindrome (31725052713).

The spelling of 20401042311 in words is "twenty billion, four hundred one million, forty-two thousand, three hundred eleven".