20078977833 has 12 divisors (see below), whose sum is σ = 30529440240. Its totient is φ = 12681459576.

The previous prime is 20078977811. The next prime is 20078977837. The reversal of 20078977833 is 33877987002.

It is not a de Polignac number, because 20078977833 - 2⁵ = 20078977801 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20078977833.

It is not an unprimeable number, because it can be changed into a prime (20078977837) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 58710291 + ... + 58710632.

It is an arithmetic number, because the mean of its divisors is an integer number (2544120020).

Almost surely, 2^20078977833 is an apocalyptic number.

It is an amenable number.

20078977833 is a deficient number, since it is larger than the sum of its proper divisors (10450462407).

20078977833 is a wasteful number, since it uses less digits than its factorization.

20078977833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117420948 (or 117420945 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 54.

The spelling of 20078977833 in words is "twenty billion, seventy-eight million, nine hundred seventy-seven thousand, eight hundred thirty-three".