20948507 has 4 divisors (see below), whose sum is σ = 22051080. Its totient is φ = 19845936.

The previous prime is 20948503. The next prime is 20948537. The reversal of 20948507 is 70584902.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20948507 - 2² = 20948503 is a prime.

It is a Duffinian number.

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, 551258 + ... + 551295.

It is an arithmetic number, because the mean of its divisors is an integer number (5512770).

Almost surely, 2^20948507 is an apocalyptic number.

20948507 is a deficient number, since it is larger than the sum of its proper divisors (1102573).

20948507 is a wasteful number, since it uses less digits than its factorization.

20948507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102572.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 20948507 is about 4576.9538997023. The cubic root of 20948507 is about 275.6667326254. Note that the first 3 decimals are identical.

It can be divided in two parts, 2094 and 8507, that added together give a palindrome (10601).

The spelling of 20948507 in words is "twenty million, nine hundred forty-eight thousand, five hundred seven".