20976377 has 2 divisors, whose sum is σ = 20976378. Its totient is φ = 20976376.

The previous prime is 20976359. The next prime is 20976407. The reversal of 20976377 is 77367902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10601536 + 10374841 = 3256^2 + 3221^2 .

It is a cyclic number.

It is not a de Polignac number, because 20976377 - 2⁸ = 20976121 is a prime.

It is a super-2 number, since 2×20976377² = 880016784092258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20976337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10488188 + 10488189.

It is an arithmetic number, because the mean of its divisors is an integer number (10488189).

Almost surely, 2^20976377 is an apocalyptic number.

It is an amenable number.

20976377 is a deficient number, since it is larger than the sum of its proper divisors (1).

20976377 is an equidigital number, since it uses as much as digits as its factorization.

20976377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 111132, while the sum is 41.

The square root of 20976377 is about 4579.9974890823. The cubic root of 20976377 is about 275.7889279249.

The spelling of 20976377 in words is "twenty million, nine hundred seventy-six thousand, three hundred seventy-seven".