21140320041023 has 4 divisors (see below), whose sum is σ = 21345565866768. Its totient is φ = 20935074215280.

The previous prime is 21140320041017. The next prime is 21140320041037. The reversal of 21140320041023 is 32014002304112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21140320041023 - 2²² = 21140315846719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21140320041023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21140320041083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102622912718 + ... + 102622912923.

It is an arithmetic number, because the mean of its divisors is an integer number (5336391466692).

Almost surely, 2^{21140320041023} is an apocalyptic number.

21140320041023 is a deficient number, since it is larger than the sum of its proper divisors (205245825745).

21140320041023 is a wasteful number, since it uses less digits than its factorization.

21140320041023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205245825744.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21140320041023 its reverse (32014002304112), we get a palindrome (53154322345135).

The spelling of 21140320041023 in words is "twenty-one trillion, one hundred forty billion, three hundred twenty million, forty-one thousand, twenty-three".