20653449 has 4 divisors (see below), whose sum is σ = 27537936. Its totient is φ = 13768964.

The previous prime is 20653447. The next prime is 20653469. The reversal of 20653449 is 94435602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20653449 - 2¹ = 20653447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20653447) 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, 3442239 + ... + 3442244.

It is an arithmetic number, because the mean of its divisors is an integer number (6884484).

Almost surely, 2^20653449 is an apocalyptic number.

It is an amenable number.

20653449 is a deficient number, since it is larger than the sum of its proper divisors (6884487).

20653449 is an equidigital number, since it uses as much as digits as its factorization.

20653449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6884486.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 20653449 is about 4544.6065836330. The cubic root of 20653449 is about 274.3663604082.

The spelling of 20653449 in words is "twenty million, six hundred fifty-three thousand, four hundred forty-nine".