20130123442515 has 64 divisors (see below), whose sum is σ = 33940520640000. Its totient is φ = 10159869533184.

The previous prime is 20130123442493. The next prime is 20130123442571. The reversal of 20130123442515 is 51524432103102.

It is not a de Polignac number, because 20130123442515 - 2⁹ = 20130123442003 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1150481247 + ... + 1150498743.

It is an arithmetic number, because the mean of its divisors is an integer number (530320635000).

Almost surely, 2^{20130123442515} is an apocalyptic number.

20130123442515 is a deficient number, since it is larger than the sum of its proper divisors (13810397197485).

20130123442515 is a wasteful number, since it uses less digits than its factorization.

20130123442515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21716.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 20130123442515 its reverse (51524432103102), we get a palindrome (71654555545617).

The spelling of 20130123442515 in words is "twenty trillion, one hundred thirty billion, one hundred twenty-three million, four hundred forty-two thousand, five hundred fifteen".