20618131607 has 16 divisors (see below), whose sum is σ = 22291733952. Its totient is φ = 18999613440.

The previous prime is 20618131591. The next prime is 20618131627. The reversal of 20618131607 is 70613181602.

It is not a de Polignac number, because 20618131607 - 2⁴ = 20618131591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20618131627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109382 + ... + 230652.

It is an arithmetic number, because the mean of its divisors is an integer number (1393233372).

Almost surely, 2^20618131607 is an apocalyptic number.

20618131607 is a deficient number, since it is larger than the sum of its proper divisors (1673602345).

20618131607 is a wasteful number, since it uses less digits than its factorization.

20618131607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121498.

The product of its (nonzero) digits is 12096, while the sum is 35.

The spelling of 20618131607 in words is "twenty billion, six hundred eighteen million, one hundred thirty-one thousand, six hundred seven".