20265431533350 has 192 divisors, whose sum is σ = 54971696824320. Its totient is φ = 4921722000000.

The previous prime is 20265431533339. The next prime is 20265431533393. The reversal of 20265431533350 is 5333513456202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12581325 + ... + 14100375.

It is an arithmetic number, because the mean of its divisors is an integer number (286310920960).

Almost surely, 2^{20265431533350} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20265431533350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27485848412160).

20265431533350 is an abundant number, since it is smaller than the sum of its proper divisors (34706265290970).

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

20265431533350 is a wasteful number, since it uses less digits than its factorization.

20265431533350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519267 (or 1519262 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 42.

Adding to 20265431533350 its reverse (5333513456202), we get a palindrome (25598944989552).

The spelling of 20265431533350 in words is "twenty trillion, two hundred sixty-five billion, four hundred thirty-one million, five hundred thirty-three thousand, three hundred fifty".