21342602719 has 4 divisors (see below), whose sum is σ = 21473539096. Its totient is φ = 21211666344.

The previous prime is 21342602707. The next prime is 21342602731. The reversal of 21342602719 is 91720624312.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21342602707) and next prime (21342602731).

It is a cyclic number.

It is not a de Polignac number, because 21342602719 - 2³¹ = 19195119071 is a prime.

It is a super-2 number, since 2×21342602719² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342602789) 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, 65467944 + ... + 65468269.

It is an arithmetic number, because the mean of its divisors is an integer number (5368384774).

Almost surely, 2^21342602719 is an apocalyptic number.

21342602719 is a deficient number, since it is larger than the sum of its proper divisors (130936377).

21342602719 is a wasteful number, since it uses less digits than its factorization.

21342602719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130936376.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 21342602719 in words is "twenty-one billion, three hundred forty-two million, six hundred two thousand, seven hundred nineteen".