20078977845 has 8 divisors (see below), whose sum is σ = 32126364576. Its totient is φ = 10708788176.

The previous prime is 20078977837. The next prime is 20078977937. The reversal of 20078977845 is 54877987002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20078977845 - 2³ = 20078977837 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 669299247 + ... + 669299276.

It is an arithmetic number, because the mean of its divisors is an integer number (4015795572).

Almost surely, 2^20078977845 is an apocalyptic number.

It is an amenable number.

20078977845 is a deficient number, since it is larger than the sum of its proper divisors (12047386731).

20078977845 is a wasteful number, since it uses less digits than its factorization.

20078977845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338598531.

The product of its (nonzero) digits is 7902720, while the sum is 57.

The spelling of 20078977845 in words is "twenty billion, seventy-eight million, nine hundred seventy-seven thousand, eight hundred forty-five".