20777361 has 8 divisors (see below), whose sum is σ = 30221664. Its totient is φ = 12592320.

The previous prime is 20777359. The next prime is 20777363. The reversal of 20777361 is 16377702.

It is an interprime number because it is at equal distance from previous prime (20777359) and next prime (20777363).

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

It is not a de Polignac number, because 20777361 - 2¹ = 20777359 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 629617 = 20777361 / (2 + 0 + 7 + 7 + 7 + 3 + 6 + 1).

It is not an unprimeable number, because it can be changed into a prime (20777363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314776 + ... + 314841.

It is an arithmetic number, because the mean of its divisors is an integer number (3777708).

Almost surely, 2^20777361 is an apocalyptic number.

It is an amenable number.

20777361 is a deficient number, since it is larger than the sum of its proper divisors (9444303).

20777361 is a wasteful number, since it uses less digits than its factorization.

20777361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629631.

The product of its (nonzero) digits is 12348, while the sum is 33.

The square root of 20777361 is about 4558.2190601155. The cubic root of 20777361 is about 274.9139609626.

The spelling of 20777361 in words is "twenty million, seven hundred seventy-seven thousand, three hundred sixty-one".