20653043 has 4 divisors (see below), whose sum is σ = 20696640. Its totient is φ = 20609448.

The previous prime is 20653007. The next prime is 20653063. The reversal of 20653043 is 34035602.

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 20653043 - 2²⁴ = 3875827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20653063) 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, 21080 + ... + 22037.

It is an arithmetic number, because the mean of its divisors is an integer number (5174160).

Almost surely, 2^20653043 is an apocalyptic number.

20653043 is a deficient number, since it is larger than the sum of its proper divisors (43597).

20653043 is an equidigital number, since it uses as much as digits as its factorization.

20653043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43596.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 20653043 is about 4544.5619150805. The cubic root of 20653043 is about 274.3645625895.

Adding to 20653043 its reverse (34035602), we get a palindrome (54688645).

The spelling of 20653043 in words is "twenty million, six hundred fifty-three thousand, forty-three".