20020077605 has 64 divisors (see below), whose sum is σ = 28565913600. Its totient is φ = 13307328000.

The previous prime is 20020077601. The next prime is 20020077617. The reversal of 20020077605 is 50677002002.

It is a happy number.

It is not a de Polignac number, because 20020077605 - 2² = 20020077601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020077601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13248800 + ... + 13250310.

It is an arithmetic number, because the mean of its divisors is an integer number (446342400).

Almost surely, 2^20020077605 is an apocalyptic number.

It is an amenable number.

20020077605 is a deficient number, since it is larger than the sum of its proper divisors (8545835995).

20020077605 is a wasteful number, since it uses less digits than its factorization.

20020077605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986.

The product of its (nonzero) digits is 5880, while the sum is 29.

Adding to 20020077605 its reverse (50677002002), we get a palindrome (70697079607).

The spelling of 20020077605 in words is "twenty billion, twenty million, seventy-seven thousand, six hundred five".