20315626135554 has 16 divisors (see below), whose sum is σ = 41203523430720. Its totient is φ = 6676496851920.

The previous prime is 20315626135549. The next prime is 20315626135603. The reversal of 20315626135554 is 45553162651302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23844631189 + ... + 23844632040.

It is an arithmetic number, because the mean of its divisors is an integer number (2575220214420).

Almost surely, 2^{20315626135554} is an apocalyptic number.

20315626135554 is an abundant number, since it is smaller than the sum of its proper divisors (20887897295166).

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

20315626135554 is a wasteful number, since it uses less digits than its factorization.

20315626135554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47689263305.

The product of its (nonzero) digits is 3240000, while the sum is 48.

Adding to 20315626135554 its reverse (45553162651302), we get a palindrome (65868788786856).

The spelling of 20315626135554 in words is "twenty trillion, three hundred fifteen billion, six hundred twenty-six million, one hundred thirty-five thousand, five hundred fifty-four".