20776377 has 8 divisors (see below), whose sum is σ = 27821664. Its totient is φ = 13791008.

The previous prime is 20776361. The next prime is 20776421. The reversal of 20776377 is 77367702.

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 20776377 - 2⁴ = 20776361 is a prime.

It is a super-2 number, since 2×20776377² = 863315682492258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20776307) 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 7 ways as a sum of consecutive naturals, for example, 14163 + ... + 15560.

It is an arithmetic number, because the mean of its divisors is an integer number (3477708).

Almost surely, 2^20776377 is an apocalyptic number.

It is an amenable number.

20776377 is a deficient number, since it is larger than the sum of its proper divisors (7045287).

20776377 is a wasteful number, since it uses less digits than its factorization.

20776377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29959.

The product of its (nonzero) digits is 86436, while the sum is 39.

The square root of 20776377 is about 4558.1111219451. Note that the first 4 decimals coincide. The cubic root of 20776377 is about 274.9096209888.

The spelling of 20776377 in words is "twenty million, seven hundred seventy-six thousand, three hundred seventy-seven".