20123612 has 12 divisors (see below), whose sum is σ = 35612640. Its totient is φ = 9948576.

The previous prime is 20123611. The next prime is 20123617. The reversal of 20123612 is 21632102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27908 + ... + 28619.

It is an arithmetic number, because the mean of its divisors is an integer number (2967720).

Almost surely, 2^20123612 is an apocalyptic number.

It is an amenable number.

20123612 is a deficient number, since it is larger than the sum of its proper divisors (15489028).

20123612 is a wasteful number, since it uses less digits than its factorization.

20123612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56620 (or 56618 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 20123612 is about 4485.9349081323. The cubic root of 20123612 is about 271.9998378027. Note that the first 3 decimals are identical.

Adding to 20123612 its reverse (21632102), we get a palindrome (41755714).

The spelling of 20123612 in words is "twenty million, one hundred twenty-three thousand, six hundred twelve".