20356168320 has 576 divisors, whose sum is σ = 77668063200. Its totient is φ = 5080651776.

The previous prime is 20356168319. The next prime is 20356168361. The reversal of 20356168320 is 2386165302.

It is a happy number.

20356168320 is a `hidden beast` number, since 2 + 0 + 3 + 5 + 616 + 8 + 32 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

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

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 245254999 + ... + 245255081.

Almost surely, 2^20356168320 is an apocalyptic number.

20356168320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20356168320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38834031600).

20356168320 is an abundant number, since it is smaller than the sum of its proper divisors (57311894880).

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

20356168320 is an frugal number, since it uses more digits than its factorization.

20356168320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 20356168320 in words is "twenty billion, three hundred fifty-six million, one hundred sixty-eight thousand, three hundred twenty".