20208312 has 32 divisors (see below), whose sum is σ = 56134800. Its totient is φ = 6736032.

The previous prime is 20208299. The next prime is 20208313. The reversal of 20208312 is 21380202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20208313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46563 + ... + 46994.

Almost surely, 2^20208312 is an apocalyptic number.

It is an amenable number.

20208312 is an abundant number, since it is smaller than the sum of its proper divisors (35926488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20208312 is a wasteful number, since it uses less digits than its factorization.

20208312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93572 (or 93562 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 20208312 is about 4495.3656136070. The cubic root of 20208312 is about 272.3809181456.

Adding to 20208312 its reverse (21380202), we get a palindrome (41588514).

The spelling of 20208312 in words is "twenty million, two hundred eight thousand, three hundred twelve".