20977117 has 8 divisors (see below), whose sum is σ = 24558912. Its totient is φ = 17541600.

The previous prime is 20977091. The next prime is 20977129. The reversal of 20977117 is 71177902.

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 20977117 - 2¹⁹ = 20452829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20977157) 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, 36259 + ... + 36832.

It is an arithmetic number, because the mean of its divisors is an integer number (3069864).

Almost surely, 2^20977117 is an apocalyptic number.

It is an amenable number.

20977117 is a deficient number, since it is larger than the sum of its proper divisors (3581795).

20977117 is an equidigital number, since it uses as much as digits as its factorization.

20977117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73139.

The product of its (nonzero) digits is 6174, while the sum is 34.

The square root of 20977117 is about 4580.0782744403. The cubic root of 20977117 is about 275.7921709604.

The spelling of 20977117 in words is "twenty million, nine hundred seventy-seven thousand, one hundred seventeen".