20247135 has 8 divisors (see below), whose sum is σ = 32395440. Its totient is φ = 10798464.

The previous prime is 20247131. The next prime is 20247193. The reversal of 20247135 is 53174202.

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

It is not a de Polignac number, because 20247135 - 2² = 20247131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20247131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 674890 + ... + 674919.

It is an arithmetic number, because the mean of its divisors is an integer number (4049430).

Almost surely, 2^20247135 is an apocalyptic number.

20247135 is a deficient number, since it is larger than the sum of its proper divisors (12148305).

20247135 is a wasteful number, since it uses less digits than its factorization.

20247135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349817.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20247135 is about 4499.6816554063. The cubic root of 20247135 is about 272.5552338729. Note that the first 3 decimals are identical.

The spelling of 20247135 in words is "twenty million, two hundred forty-seven thousand, one hundred thirty-five".