21011418157383 has 6 divisors (see below), whose sum is σ = 30349826227344. Its totient is φ = 14007612104916.

The previous prime is 21011418157369. The next prime is 21011418157399. The reversal of 21011418157383 is 38375181411012.

21011418157383 is a `hidden beast` number, since 2 + 1 + 0 + 1 + 1 + 418 + 157 + 3 + 83 = 666.

It is not a de Polignac number, because 21011418157383 - 2⁶ = 21011418157319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011418157783) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1167301008735 + ... + 1167301008752.

It is an arithmetic number, because the mean of its divisors is an integer number (5058304371224).

Almost surely, 2^{21011418157383} is an apocalyptic number.

21011418157383 is a deficient number, since it is larger than the sum of its proper divisors (9338408069961).

21011418157383 is a wasteful number, since it uses less digits than its factorization.

21011418157383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334602017493 (or 2334602017490 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

Adding to 21011418157383 its reverse (38375181411012), we get a palindrome (59386599568395).

The spelling of 21011418157383 in words is "twenty-one trillion, eleven billion, four hundred eighteen million, one hundred fifty-seven thousand, three hundred eighty-three".