20115465562139 has 8 divisors (see below), whose sum is σ = 20155687386912. Its totient is φ = 20075244654400.

The previous prime is 20115465562117. The next prime is 20115465562169. The reversal of 20115465562139 is 93126556451102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20115465562139 - 2⁴⁴ = 2523279517723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20115465562169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58888439 + ... + 59229039.

It is an arithmetic number, because the mean of its divisors is an integer number (2519460923364).

Almost surely, 2^{20115465562139} is an apocalyptic number.

20115465562139 is a deficient number, since it is larger than the sum of its proper divisors (40221824773).

20115465562139 is a wasteful number, since it uses less digits than its factorization.

20115465562139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458517.

The product of its (nonzero) digits is 1944000, while the sum is 50.

The spelling of 20115465562139 in words is "twenty trillion, one hundred fifteen billion, four hundred sixty-five million, five hundred sixty-two thousand, one hundred thirty-nine".