20114236011891 has 128 divisors (see below), whose sum is σ = 32787652608000. Its totient is φ = 10721186251776.

The previous prime is 20114236011811. The next prime is 20114236011949. The reversal of 20114236011891 is 19811063241102.

It is a happy number.

It is not a de Polignac number, because 20114236011891 - 2⁹ = 20114236011379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20114236011811) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3711795780 + ... + 3711801198.

It is an arithmetic number, because the mean of its divisors is an integer number (256153536000).

Almost surely, 2^{20114236011891} is an apocalyptic number.

20114236011891 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20114236011891 is a deficient number, since it is larger than the sum of its proper divisors (12673416596109).

20114236011891 is a wasteful number, since it uses less digits than its factorization.

20114236011891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6713.

The product of its (nonzero) digits is 20736, while the sum is 39.

Adding to 20114236011891 its reverse (19811063241102), we get a palindrome (39925299252993).

The spelling of 20114236011891 in words is "twenty trillion, one hundred fourteen billion, two hundred thirty-six million, eleven thousand, eight hundred ninety-one".