20502356952 has 192 divisors, whose sum is σ = 67873593600. Its totient is φ = 5093679360.

The previous prime is 20502356921. The next prime is 20502356971. The reversal of 20502356952 is 25965320502.

It is a self number, because there is not a number n which added to its sum of digits gives 20502356952.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 263074 + ... + 331982.

It is an arithmetic number, because the mean of its divisors is an integer number (353508300).

Almost surely, 2^20502356952 is an apocalyptic number.

20502356952 is a gapful number since it is divisible by the number (22) 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 20502356952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33936796800).

20502356952 is an abundant number, since it is smaller than the sum of its proper divisors (47371236648).

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

20502356952 is a wasteful number, since it uses less digits than its factorization.

20502356952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68966 (or 68955 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 39.

The spelling of 20502356952 in words is "twenty billion, five hundred two million, three hundred fifty-six thousand, nine hundred fifty-two".