20948506 has 8 divisors (see below), whose sum is σ = 31634100. Its totient is φ = 10403808.

The previous prime is 20948503. The next prime is 20948537. The reversal of 20948506 is 60584902.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20784481 + 164025 = 4559^2 + 405^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20948503) 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, 34851 + ... + 35446.

Almost surely, 2^20948506 is an apocalyptic number.

20948506 is a deficient number, since it is larger than the sum of its proper divisors (10685594).

20948506 is a wasteful number, since it uses less digits than its factorization.

20948506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70448.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 20948506 is about 4576.9537904593. The cubic root of 20948506 is about 275.6667282390. Note that the first 3 decimals are identical.

The spelling of 20948506 in words is "twenty million, nine hundred forty-eight thousand, five hundred six".