20612347 has 24 divisors (see below), whose sum is σ = 26171136. Its totient is φ = 15869568.

The previous prime is 20612341. The next prime is 20612357. The reversal of 20612347 is 74321602.

It is a de Polignac number, because none of the positive numbers 2^k-20612347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20612341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46308 + ... + 46750.

It is an arithmetic number, because the mean of its divisors is an integer number (1090464).

Almost surely, 2^20612347 is an apocalyptic number.

20612347 is a deficient number, since it is larger than the sum of its proper divisors (5558789).

20612347 is a wasteful number, since it uses less digits than its factorization.

20612347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507 (or 490 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 20612347 is about 4540.0822679771. The cubic root of 20612347 is about 274.1842359418.

Adding to 20612347 its reverse (74321602), we get a palindrome (94933949).

The spelling of 20612347 in words is "twenty million, six hundred twelve thousand, three hundred forty-seven".