20315123540406 has 24 divisors (see below), whose sum is σ = 45646326968424. Its totient is φ = 6771707846640.

The previous prime is 20315123540353. The next prime is 20315123540407. The reversal of 20315123540406 is 60404532151302.

20315123540406 is a `hidden beast` number, since 2 + 0 + 3 + 1 + 51 + 23 + 540 + 40 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20315123540407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20900332375 + ... + 20900333346.

It is an arithmetic number, because the mean of its divisors is an integer number (1901930290351).

Almost surely, 2^{20315123540406} is an apocalyptic number.

20315123540406 is an abundant number, since it is smaller than the sum of its proper divisors (25331203428018).

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

20315123540406 is an equidigital number, since it uses as much as digits as its factorization.

20315123540406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41800665738 (or 41800665726 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 20315123540406 its reverse (60404532151302), we get a palindrome (80719655691708).

The spelling of 20315123540406 in words is "twenty trillion, three hundred fifteen billion, one hundred twenty-three million, five hundred forty thousand, four hundred six".