20140242123015 has 64 divisors (see below), whose sum is σ = 40961742059520. Its totient is φ = 9197543692800.

The previous prime is 20140242122969. The next prime is 20140242123019. The reversal of 20140242123015 is 51032124204102.

20140242123015 is a `hidden beast` number, since 2 + 0 + 1 + 4 + 0 + 2 + 421 + 230 + 1 + 5 = 666.

It is not a de Polignac number, because 20140242123015 - 2⁹ = 20140242122503 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20140242123015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20140242123019) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9983811 + ... + 11830340.

It is an arithmetic number, because the mean of its divisors is an integer number (640027219680).

Almost surely, 2^{20140242123015} is an apocalyptic number.

20140242123015 is an abundant number, since it is smaller than the sum of its proper divisors (20821499936505).

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

20140242123015 is a wasteful number, since it uses less digits than its factorization.

20140242123015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21815149 (or 21815143 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 20140242123015 its reverse (51032124204102), we get a palindrome (71172366327117).

The spelling of 20140242123015 in words is "twenty trillion, one hundred forty billion, two hundred forty-two million, one hundred twenty-three thousand, fifteen".