21142256313 has 8 divisors (see below), whose sum is σ = 28191710176. Its totient is φ = 14093820000.

The previous prime is 21142256287. The next prime is 21142256323. The reversal of 21142256313 is 31365224112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21142256313 - 2⁹ = 21142255801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21142256323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204508 + ... + 290013.

It is an arithmetic number, because the mean of its divisors is an integer number (3523963772).

Almost surely, 2^21142256313 is an apocalyptic number.

It is an amenable number.

21142256313 is a deficient number, since it is larger than the sum of its proper divisors (7049453863).

21142256313 is a wasteful number, since it uses less digits than its factorization.

21142256313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508775.

The product of its digits is 8640, while the sum is 30.

The spelling of 21142256313 in words is "twenty-one billion, one hundred forty-two million, two hundred fifty-six thousand, three hundred thirteen".