20242649 has 8 divisors (see below), whose sum is σ = 23210880. Its totient is φ = 17293536.

The previous prime is 20242603. The next prime is 20242687. The reversal of 20242649 is 94624202.

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

It is a cyclic number.

It is not a de Polignac number, because 20242649 - 2²⁰ = 19194073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20242549) 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, 2429 + ... + 6810.

It is an arithmetic number, because the mean of its divisors is an integer number (2901360).

Almost surely, 2^20242649 is an apocalyptic number.

It is an amenable number.

20242649 is a deficient number, since it is larger than the sum of its proper divisors (2968231).

20242649 is an equidigital number, since it uses as much as digits as its factorization.

20242649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9559.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 20242649 is about 4499.1831480837. The cubic root of 20242649 is about 272.5351030726.

The spelling of 20242649 in words is "twenty million, two hundred forty-two thousand, six hundred forty-nine".