20122515131550 has 96 divisors (see below), whose sum is σ = 53745131862240. Its totient is φ = 4953000614400.

The previous prime is 20122515131527. The next prime is 20122515131561. The reversal of 20122515131550 is 5513151522102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43036020 + ... + 43501080.

It is an arithmetic number, because the mean of its divisors is an integer number (559845123565).

Almost surely, 2^{20122515131550} is an apocalyptic number.

20122515131550 is an abundant number, since it is smaller than the sum of its proper divisors (33622616730690).

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

20122515131550 is a wasteful number, since it uses less digits than its factorization.

20122515131550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487278 (or 487273 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 33.

Adding to 20122515131550 its reverse (5513151522102), we get a palindrome (25635666653652).

The spelling of 20122515131550 in words is "twenty trillion, one hundred twenty-two billion, five hundred fifteen million, one hundred thirty-one thousand, five hundred fifty".