20420002345613 has 4 divisors (see below), whose sum is σ = 21990771756828. Its totient is φ = 18849232934400.

The previous prime is 20420002345609. The next prime is 20420002345637. The reversal of 20420002345613 is 31654320002402.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13556844169444 + 6863158176169 = 3681962^2 + 2619763^2 .

It is a cyclic number.

It is not a de Polignac number, because 20420002345613 - 2² = 20420002345609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20420002345613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420002345313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 785384705588 + ... + 785384705613.

It is an arithmetic number, because the mean of its divisors is an integer number (5497692939207).

Almost surely, 2^{20420002345613} is an apocalyptic number.

It is an amenable number.

20420002345613 is a deficient number, since it is larger than the sum of its proper divisors (1570769411215).

20420002345613 is a wasteful number, since it uses less digits than its factorization.

20420002345613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570769411214.

The product of its (nonzero) digits is 34560, while the sum is 32.

The spelling of 20420002345613 in words is "twenty trillion, four hundred twenty billion, two million, three hundred forty-five thousand, six hundred thirteen".