20285245116 has 108 divisors (see below), whose sum is σ = 53990642160. Its totient is φ = 6417895680.

The previous prime is 20285245109. The next prime is 20285245129. The reversal of 20285245116 is 61154258202.

20285245116 is a `hidden beast` number, since 20 + 285 + 245 + 116 = 666.

It is a super-2 number, since 2×20285245116² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2015625 + ... + 2025663.

Almost surely, 2^20285245116 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20285245116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26995321080).

20285245116 is an abundant number, since it is smaller than the sum of its proper divisors (33705397044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20285245116 is a wasteful number, since it uses less digits than its factorization.

20285245116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10164 (or 10122 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The spelling of 20285245116 in words is "twenty billion, two hundred eighty-five million, two hundred forty-five thousand, one hundred sixteen".