20605265602 has 4 divisors (see below), whose sum is σ = 30907898406. Its totient is φ = 10302632800.

The previous prime is 20605265591. The next prime is 20605265621. The reversal of 20605265602 is 20656250602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16255995001 + 4349270601 = 127499^2 + 65949^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5151316399 + ... + 5151316402.

Almost surely, 2^20605265602 is an apocalyptic number.

20605265602 is a deficient number, since it is larger than the sum of its proper divisors (10302632804).

20605265602 is a wasteful number, since it uses less digits than its factorization.

20605265602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10302632803.

The product of its (nonzero) digits is 43200, while the sum is 34.

The spelling of 20605265602 in words is "twenty billion, six hundred five million, two hundred sixty-five thousand, six hundred two".