21403131024313 has 4 divisors (see below), whose sum is σ = 22529611604560. Its totient is φ = 20276650444068.

The previous prime is 21403131024311. The next prime is 21403131024329. The reversal of 21403131024313 is 31342013130412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21403131024313 - 2¹ = 21403131024311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21403131024311) 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, 563240290095 + ... + 563240290132.

It is an arithmetic number, because the mean of its divisors is an integer number (5632402901140).

Almost surely, 2^{21403131024313} is an apocalyptic number.

It is an amenable number.

21403131024313 is a deficient number, since it is larger than the sum of its proper divisors (1126480580247).

21403131024313 is a wasteful number, since it uses less digits than its factorization.

21403131024313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126480580246.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 21403131024313 its reverse (31342013130412), we get a palindrome (52745144154725).

The spelling of 21403131024313 in words is "twenty-one trillion, four hundred three billion, one hundred thirty-one million, twenty-four thousand, three hundred thirteen".