20315123046415 has 4 divisors (see below), whose sum is σ = 24378147655704. Its totient is φ = 16252098437128.

The previous prime is 20315123046409. The next prime is 20315123046433. The reversal of 20315123046415 is 51464032151302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20315123046415 - 2²⁹ = 20314586175503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2031512304637 + ... + 2031512304646.

It is an arithmetic number, because the mean of its divisors is an integer number (6094536913926).

Almost surely, 2^{20315123046415} is an apocalyptic number.

20315123046415 is a deficient number, since it is larger than the sum of its proper divisors (4063024609289).

20315123046415 is an equidigital number, since it uses as much as digits as its factorization.

20315123046415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4063024609288.

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 20315123046415 its reverse (51464032151302), we get a palindrome (71779155197717).

The spelling of 20315123046415 in words is "twenty trillion, three hundred fifteen billion, one hundred twenty-three million, forty-six thousand, four hundred fifteen".