20246445613 has 8 divisors (see below), whose sum is σ = 22176634680. Its totient is φ = 18398392320.

The previous prime is 20246445607. The next prime is 20246445623. The reversal of 20246445613 is 31654464202.

It can be written as a sum of positive squares in 4 ways, for example, as 9161935524 + 11084510089 = 95718^2 + 105283^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20246445613 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 (20246445623) 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, 20533428 + ... + 20534413.

It is an arithmetic number, because the mean of its divisors is an integer number (2772079335).

Almost surely, 2^20246445613 is an apocalyptic number.

It is an amenable number.

20246445613 is a deficient number, since it is larger than the sum of its proper divisors (1930189067).

20246445613 is a wasteful number, since it uses less digits than its factorization.

20246445613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41067887.

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 20246445613 in words is "twenty billion, two hundred forty-six million, four hundred forty-five thousand, six hundred thirteen".