20266977 has 16 divisors (see below), whose sum is σ = 28719360. Its totient is φ = 12676752.

The previous prime is 20266957. The next prime is 20266999. The reversal of 20266977 is 77966202.

It is not a de Polignac number, because 20266977 - 2⁷ = 20266849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20266927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4438 + ... + 7760.

It is an arithmetic number, because the mean of its divisors is an integer number (1794960).

Almost surely, 2^20266977 is an apocalyptic number.

It is an amenable number.

20266977 is a deficient number, since it is larger than the sum of its proper divisors (8452383).

20266977 is a wasteful number, since it uses less digits than its factorization.

20266977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3452.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 20266977 is about 4501.8859381375. The cubic root of 20266977 is about 272.6442386514.

The spelling of 20266977 in words is "twenty million, two hundred sixty-six thousand, nine hundred seventy-seven".