20613465123 has 32 divisors (see below), whose sum is σ = 29947453440. Its totient is φ = 12567260160.

The previous prime is 20613465071. The next prime is 20613465239. The reversal of 20613465123 is 32156431602.

It is not a de Polignac number, because 20613465123 - 2⁸ = 20613464867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20613466123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 229363 + ... + 306323.

It is an arithmetic number, because the mean of its divisors is an integer number (935857920).

Almost surely, 2^20613465123 is an apocalyptic number.

20613465123 is a deficient number, since it is larger than the sum of its proper divisors (9333988317).

20613465123 is a wasteful number, since it uses less digits than its factorization.

20613465123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77147.

The product of its (nonzero) digits is 25920, while the sum is 33.

Adding to 20613465123 its reverse (32156431602), we get a palindrome (52769896725).

The spelling of 20613465123 in words is "twenty billion, six hundred thirteen million, four hundred sixty-five thousand, one hundred twenty-three".