216045000020 has 12 divisors (see below), whose sum is σ = 453694500084. Its totient is φ = 86418000000.

The previous prime is 216045000001. The next prime is 216045000097. The reversal of 216045000020 is 20000540612.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 122172619024 + 93872380996 = 349532^2 + 306386^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 10802250001 = 216045000020 / (2 + 1 + 6 + 0 + 4 + 5 + 0 + 0 + 0 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 216044999956 and 216045000001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5401124981 + ... + 5401125020.

It is an arithmetic number, because the mean of its divisors is an integer number (37807875007).

Almost surely, 2^216045000020 is an apocalyptic number.

216045000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216045000020 is an abundant number, since it is smaller than the sum of its proper divisors (237649500064).

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

216045000020 is a wasteful number, since it uses less digits than its factorization.

216045000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10802250010 (or 10802250008 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 216045000020 its reverse (20000540612), we get a palindrome (236045540632).

The spelling of 216045000020 in words is "two hundred sixteen billion, forty-five million, twenty", and thus it is an aban number.