20415660112351 has 4 divisors (see below), whose sum is σ = 23332182985552. Its totient is φ = 17499137239152.

The previous prime is 20415660112303. The next prime is 20415660112363. The reversal of 20415660112351 is 15321106651402.

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 20415660112351 - 2⁹ = 20415660111839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20415660112351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20415660112451) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1458261436590 + ... + 1458261436603.

It is an arithmetic number, because the mean of its divisors is an integer number (5833045746388).

Almost surely, 2^{20415660112351} is an apocalyptic number.

20415660112351 is a deficient number, since it is larger than the sum of its proper divisors (2916522873201).

20415660112351 is an equidigital number, since it uses as much as digits as its factorization.

20415660112351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2916522873200.

The product of its (nonzero) digits is 43200, while the sum is 37.

Adding to 20415660112351 its reverse (15321106651402), we get a palindrome (35736766763753).

The spelling of 20415660112351 in words is "twenty trillion, four hundred fifteen billion, six hundred sixty million, one hundred twelve thousand, three hundred fifty-one".