20012308 has 6 divisors (see below), whose sum is σ = 35021546. Its totient is φ = 10006152.

The previous prime is 20012303. The next prime is 20012341. The reversal of 20012308 is 80321002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19963024 + 49284 = 4468^2 + 222^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20012291 and 20012300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012303) 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, 2501535 + ... + 2501542.

Almost surely, 2^20012308 is an apocalyptic number.

It is an amenable number.

20012308 is a deficient number, since it is larger than the sum of its proper divisors (15009238).

20012308 is a wasteful number, since it uses less digits than its factorization.

20012308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5003081 (or 5003079 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 20012308 is about 4473.5118195887. The cubic root of 20012308 is about 271.4974319946.

The spelling of 20012308 in words is "twenty million, twelve thousand, three hundred eight".