20315305535340 has 48 divisors (see below), whose sum is σ = 56886717841632. Its totient is φ = 5417046967296.

The previous prime is 20315305535309. The next prime is 20315305535347. The reversal of 20315305535340 is 4353550351302.

It is not an unprimeable number, because it can be changed into a prime (20315305535347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10603479 + ... + 12371918.

It is an arithmetic number, because the mean of its divisors is an integer number (1185139955034).

Almost surely, 2^{20315305535340} is an apocalyptic number.

20315305535340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20315305535340 is an abundant number, since it is smaller than the sum of its proper divisors (36571412306292).

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

20315305535340 is a wasteful number, since it uses less digits than its factorization.

20315305535340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22990146 (or 22990144 counting only the distinct ones).

The product of its (nonzero) digits is 405000, while the sum is 39.

Adding to 20315305535340 its reverse (4353550351302), we get a palindrome (24668855886642).

The spelling of 20315305535340 in words is "twenty trillion, three hundred fifteen billion, three hundred five million, five hundred thirty-five thousand, three hundred forty".