20634493607 has 16 divisors (see below), whose sum is σ = 25812639552. Its totient is φ = 16058545920.

The previous prime is 20634493591. The next prime is 20634493619. The reversal of 20634493607 is 70639443602.

It is a cyclic number.

It is not a de Polignac number, because 20634493607 - 2⁴ = 20634493591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20634493687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1853078 + ... + 1864179.

It is an arithmetic number, because the mean of its divisors is an integer number (1613289972).

Almost surely, 2^20634493607 is an apocalyptic number.

20634493607 is a deficient number, since it is larger than the sum of its proper divisors (5178145945).

20634493607 is a wasteful number, since it uses less digits than its factorization.

20634493607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3717338.

The product of its (nonzero) digits is 653184, while the sum is 44.

The spelling of 20634493607 in words is "twenty billion, six hundred thirty-four million, four hundred ninety-three thousand, six hundred seven".