20391245013 has 8 divisors (see below), whose sum is σ = 27291705408. Its totient is φ = 13542473984.

The previous prime is 20391245011. The next prime is 20391245023. The reversal of 20391245013 is 31054219302.

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 20391245013 - 2¹ = 20391245011 is a prime.

It is a super-4 number, since 4×20391245013⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20391245011) 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, 12921420 + ... + 12922997.

It is an arithmetic number, because the mean of its divisors is an integer number (3411463176).

Almost surely, 2^20391245013 is an apocalyptic number.

It is an amenable number.

20391245013 is a deficient number, since it is larger than the sum of its proper divisors (6900460395).

20391245013 is a wasteful number, since it uses less digits than its factorization.

20391245013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25844683.

The product of its (nonzero) digits is 6480, while the sum is 30.

The spelling of 20391245013 in words is "twenty billion, three hundred ninety-one million, two hundred forty-five thousand, thirteen".