20077851 has 16 divisors (see below), whose sum is σ = 28365440. Its totient is φ = 12597120.

The previous prime is 20077817. The next prime is 20077853. The reversal of 20077851 is 15877002.

It is a happy number.

It is not a de Polignac number, because 20077851 - 2⁹ = 20077339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20077853) 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 15 ways as a sum of consecutive naturals, for example, 8211 + ... + 10371.

It is an arithmetic number, because the mean of its divisors is an integer number (1772840).

Almost surely, 2^20077851 is an apocalyptic number.

20077851 is a deficient number, since it is larger than the sum of its proper divisors (8287589).

20077851 is a wasteful number, since it uses less digits than its factorization.

20077851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2346.

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 20077851 is about 4480.8315076557. The cubic root of 20077851 is about 271.7935058693.

The spelling of 20077851 in words is "twenty million, seventy-seven thousand, eight hundred fifty-one".