20020343616 has 840 divisors, whose sum is σ = 77490986496. Its totient is φ = 4971663360.

The previous prime is 20020343557. The next prime is 20020343639. The reversal of 20020343616 is 61634302002.

20020343616 is a `hidden beast` number, since 2 + 0 + 0 + 2 + 0 + 3 + 43 + 616 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20020343616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 541090350 + ... + 541090386.

Almost surely, 2^20020343616 is an apocalyptic number.

20020343616 is a gapful number since it is divisible by the number (26) 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 20020343616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38745493248).

20020343616 is an abundant number, since it is smaller than the sum of its proper divisors (57470642880).

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

20020343616 is a wasteful number, since it uses less digits than its factorization.

20020343616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 20020343616 its reverse (61634302002), we get a palindrome (81654645618).

The spelling of 20020343616 in words is "twenty billion, twenty million, three hundred forty-three thousand, six hundred sixteen".