20653445 has 8 divisors (see below), whose sum is σ = 25311744. Its totient is φ = 16171024.

The previous prime is 20653439. The next prime is 20653447. The reversal of 20653445 is 54435602.

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 20653445 - 2⁸ = 20653189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 43709 + ... + 44178.

It is an arithmetic number, because the mean of its divisors is an integer number (3163968).

Almost surely, 2^20653445 is an apocalyptic number.

It is an amenable number.

20653445 is a deficient number, since it is larger than the sum of its proper divisors (4658299).

20653445 is an equidigital number, since it uses as much as digits as its factorization.

20653445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87939.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 20653445 is about 4544.6061435508. The cubic root of 20653445 is about 274.3663426959.

The spelling of 20653445 in words is "twenty million, six hundred fifty-three thousand, four hundred forty-five".