20506467 has 4 divisors (see below), whose sum is σ = 27341960. Its totient is φ = 13670976.

The previous prime is 20506459. The next prime is 20506487. The reversal of 20506467 is 76460502.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20506467 - 2³ = 20506459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20506417) 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, 3417742 + ... + 3417747.

It is an arithmetic number, because the mean of its divisors is an integer number (6835490).

Almost surely, 2^20506467 is an apocalyptic number.

20506467 is a deficient number, since it is larger than the sum of its proper divisors (6835493).

20506467 is an equidigital number, since it uses as much as digits as its factorization.

20506467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6835492.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 20506467 is about 4528.4066734338. The cubic root of 20506467 is about 273.7139599351.

Adding to 20506467 its reverse (76460502), we get a palindrome (96966969).

The spelling of 20506467 in words is "twenty million, five hundred six thousand, four hundred sixty-seven".