20315445135650 has 96 divisors (see below), whose sum is σ = 45730408816512. Its totient is φ = 6554813414400.

The previous prime is 20315445135649. The next prime is 20315445135659. The reversal of 20315445135650 is 5653154451302.

It is a happy number.

It is a super-2 number, since 2×20315445135650² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20315445135659) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 52386965 + ... + 52773335.

It is an arithmetic number, because the mean of its divisors is an integer number (476358425172).

Almost surely, 2^{20315445135650} is an apocalyptic number.

20315445135650 is an abundant number, since it is smaller than the sum of its proper divisors (25414963680862).

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

20315445135650 is a wasteful number, since it uses less digits than its factorization.

20315445135650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395244 (or 395239 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 44.

Adding to 20315445135650 its reverse (5653154451302), we get a palindrome (25968599586952).

The spelling of 20315445135650 in words is "twenty trillion, three hundred fifteen billion, four hundred forty-five million, one hundred thirty-five thousand, six hundred fifty".