20366333620 has 12 divisors (see below), whose sum is σ = 42769300644. Its totient is φ = 8146533440.

The previous prime is 20366333587. The next prime is 20366333623. The reversal of 20366333620 is 2633366302.

It can be written as a sum of positive squares in 2 ways, for example, as 14749130916 + 5617202704 = 121446^2 + 74948^2 .

It is a super-2 number, since 2×20366333620² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20366333623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509158321 + ... + 509158360.

It is an arithmetic number, because the mean of its divisors is an integer number (3564108387).

Almost surely, 2^20366333620 is an apocalyptic number.

20366333620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20366333620 is an abundant number, since it is smaller than the sum of its proper divisors (22402967024).

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

20366333620 is a wasteful number, since it uses less digits than its factorization.

20366333620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018316690 (or 1018316688 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 34.

Adding to 20366333620 its reverse (2633366302), we get a palindrome (22999699922).

The spelling of 20366333620 in words is "twenty billion, three hundred sixty-six million, three hundred thirty-three thousand, six hundred twenty".