16020420613 has 8 divisors (see below), whose sum is σ = 16631835480. Its totient is φ = 15412938240.

The previous prime is 16020420601. The next prime is 16020420629. The reversal of 16020420613 is 31602402061.

It can be written as a sum of positive squares in 4 ways, for example, as 9001834884 + 7018585729 = 94878^2 + 83777^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 16020420613 - 2²⁹ = 15483549701 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 (16020420643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 974820 + ... + 991117.

It is an arithmetic number, because the mean of its divisors is an integer number (2078979435).

Almost surely, 2^16020420613 is an apocalyptic number.

It is an amenable number.

16020420613 is a deficient number, since it is larger than the sum of its proper divisors (611414867).

16020420613 is a wasteful number, since it uses less digits than its factorization.

16020420613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1966247.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 16020420613 its reverse (31602402061), we get a palindrome (47622822674).

The spelling of 16020420613 in words is "sixteen billion, twenty million, four hundred twenty thousand, six hundred thirteen".