20604640602 has 64 divisors (see below), whose sum is σ = 50784620544. Its totient is φ = 5427172800.

The previous prime is 20604640579. The next prime is 20604640603.

20604640602 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 20604640602.

It is not an unprimeable number, because it can be changed into a prime (20604640603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 405727 + ... + 453677.

It is an arithmetic number, because the mean of its divisors is an integer number (793509696).

Almost surely, 2^20604640602 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20604640602, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25392310272).

20604640602 is an abundant number, since it is smaller than the sum of its proper divisors (30179979942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20604640602 is a wasteful number, since it uses less digits than its factorization.

20604640602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48763.

The product of its (nonzero) digits is 13824, while the sum is 30.

The spelling of 20604640602 in words is "twenty billion, six hundred four million, six hundred forty thousand, six hundred two".