20276866 has 4 divisors (see below), whose sum is σ = 30415302. Its totient is φ = 10138432.

The previous prime is 20276863. The next prime is 20276873. The reversal of 20276866 is 66867202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66867202 = 2 ⋅33433601.

It can be written as a sum of positive squares in only one way, i.e., 16982641 + 3294225 = 4121^2 + 1815^2 .

It is a super-2 number, since 2×20276866² = 822302589563912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20276863) 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 as a sum of consecutive naturals, namely, 5069215 + ... + 5069218.

Almost surely, 2^20276866 is an apocalyptic number.

20276866 is a deficient number, since it is larger than the sum of its proper divisors (10138436).

20276866 is a wasteful number, since it uses less digits than its factorization.

20276866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10138435.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 20276866 is about 4502.9841216687. The cubic root of 20276866 is about 272.6885758093.

The spelling of 20276866 in words is "twenty million, two hundred seventy-six thousand, eight hundred sixty-six".