21674871013 has 4 divisors (see below), whose sum is σ = 21772067968. Its totient is φ = 21577674060.

The previous prime is 21674871007. The next prime is 21674871019. The reversal of 21674871013 is 31017847612.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (21674871007) and next prime (21674871019).

It is a cyclic number.

It is not a de Polignac number, because 21674871013 - 2¹³ = 21674862821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21674871019) 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 3 ways as a sum of consecutive naturals, for example, 48598143 + ... + 48598588.

It is an arithmetic number, because the mean of its divisors is an integer number (5443016992).

Almost surely, 2^21674871013 is an apocalyptic number.

It is an amenable number.

21674871013 is a deficient number, since it is larger than the sum of its proper divisors (97196955).

21674871013 is an equidigital number, since it uses as much as digits as its factorization.

21674871013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97196954.

The product of its (nonzero) digits is 56448, while the sum is 40.

The spelling of 21674871013 in words is "twenty-one billion, six hundred seventy-four million, eight hundred seventy-one thousand, thirteen".