20052351616 has 64 divisors (see below), whose sum is σ = 43613445600. Its totient is φ = 9107645440.

The previous prime is 20052351593. The next prime is 20052351619. The reversal of 20052351616 is 61615325002.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×20052351616² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20052351619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2097375 + ... + 2106913.

Almost surely, 2^20052351616 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 20052351616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21806722800).

20052351616 is an abundant number, since it is smaller than the sum of its proper divisors (23561093984).

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

20052351616 is a wasteful number, since it uses less digits than its factorization.

20052351616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11057 (or 11045 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 20052351616 its reverse (61615325002), we get a palindrome (81667676618).

The spelling of 20052351616 in words is "twenty billion, fifty-two million, three hundred fifty-one thousand, six hundred sixteen".