20285245117 has 8 divisors (see below), whose sum is σ = 21189825216. Its totient is φ = 19382549472.

The previous prime is 20285245109. The next prime is 20285245129. The reversal of 20285245117 is 71154258202.

It is a happy number.

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 20285245117 - 2³ = 20285245109 is a prime.

It is a super-2 number, since 2×20285245117² (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 (20285240117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 449083 + ... + 492184.

It is an arithmetic number, because the mean of its divisors is an integer number (2648728152).

Almost surely, 2^20285245117 is an apocalyptic number.

It is an amenable number.

20285245117 is a deficient number, since it is larger than the sum of its proper divisors (904580099).

20285245117 is an equidigital number, since it uses as much as digits as its factorization.

20285245117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942227.

The product of its (nonzero) digits is 44800, while the sum is 37.

The spelling of 20285245117 in words is "twenty billion, two hundred eighty-five million, two hundred forty-five thousand, one hundred seventeen".