21140004131 has 16 divisors (see below), whose sum is σ = 22006304640. Its totient is φ = 20289709440.

The previous prime is 21140004121. The next prime is 21140004133. The reversal of 21140004131 is 13140004112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21140004131 - 2²⁶ = 21072895267 is a prime.

It is a super-2 number, since 2×21140004131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21140004133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4034045 + ... + 4039281.

It is an arithmetic number, because the mean of its divisors is an integer number (1375394040).

Almost surely, 2^21140004131 is an apocalyptic number.

21140004131 is a deficient number, since it is larger than the sum of its proper divisors (866300509).

21140004131 is a wasteful number, since it uses less digits than its factorization.

21140004131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6734.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21140004131 its reverse (13140004112), we get a palindrome (34280008243).

The spelling of 21140004131 in words is "twenty-one billion, one hundred forty million, four thousand, one hundred thirty-one".