20604280406 has 4 divisors (see below), whose sum is σ = 30906420612. Its totient is φ = 10302140202.

The previous prime is 20604280397. The next prime is 20604280421. The reversal of 20604280406 is 60408240602.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5151070100 + ... + 5151070103.

It is an arithmetic number, because the mean of its divisors is an integer number (7726605153).

Almost surely, 2^20604280406 is an apocalyptic number.

20604280406 is a deficient number, since it is larger than the sum of its proper divisors (10302140206).

20604280406 is a wasteful number, since it uses less digits than its factorization.

20604280406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10302140205.

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 20604280406 in words is "twenty billion, six hundred four million, two hundred eighty thousand, four hundred six".