21142040313 has 16 divisors (see below), whose sum is σ = 28726488000. Its totient is φ = 13826240064.

The previous prime is 21142040287. The next prime is 21142040321. The reversal of 21142040313 is 31304024112.

It is not a de Polignac number, because 21142040313 - 2¹⁸ = 21141778169 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21142040313.

It is not an unprimeable number, because it can be changed into a prime (21142047313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1334563 + ... + 1350311.

It is an arithmetic number, because the mean of its divisors is an integer number (1795405500).

Almost surely, 2^21142040313 is an apocalyptic number.

It is an amenable number.

21142040313 is a deficient number, since it is larger than the sum of its proper divisors (7584447687).

21142040313 is a wasteful number, since it uses less digits than its factorization.

21142040313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24248.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21142040313 its reverse (31304024112), we get a palindrome (52446064425).

The spelling of 21142040313 in words is "twenty-one billion, one hundred forty-two million, forty thousand, three hundred thirteen".