20406602280602 has 4 divisors (see below), whose sum is σ = 30609903420906. Its totient is φ = 10203301140300.

The previous prime is 20406602280587. The next prime is 20406602280607. The reversal of 20406602280602 is 20608220660402.

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., 19332122842561 + 1074479438041 = 4396831^2 + 1036571^2 .

It is not an unprimeable number, because it can be changed into a prime (20406602280607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101650570149 + ... + 5101650570152.

Almost surely, 2^{20406602280602} is an apocalyptic number.

20406602280602 is a deficient number, since it is larger than the sum of its proper divisors (10203301140304).

20406602280602 is a wasteful number, since it uses less digits than its factorization.

20406602280602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10203301140303.

The product of its (nonzero) digits is 110592, while the sum is 38.

The spelling of 20406602280602 in words is "twenty trillion, four hundred six billion, six hundred two million, two hundred eighty thousand, six hundred two".