20675812 has 6 divisors (see below), whose sum is σ = 36182678. Its totient is φ = 10337904.

The previous prime is 20675797. The next prime is 20675813. The reversal of 20675812 is 21857602.

It can be written as a sum of positive squares in only one way, i.e., 10601536 + 10074276 = 3256^2 + 3174^2 .

It is not an unprimeable number, because it can be changed into a prime (20675813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2584473 + ... + 2584480.

Almost surely, 2^20675812 is an apocalyptic number.

It is an amenable number.

20675812 is a deficient number, since it is larger than the sum of its proper divisors (15506866).

20675812 is a wasteful number, since it uses less digits than its factorization.

20675812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5168957 (or 5168955 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 20675812 is about 4547.0663069720. The cubic root of 20675812 is about 274.4653501983.

The spelling of 20675812 in words is "twenty million, six hundred seventy-five thousand, eight hundred twelve".