20623443 has 8 divisors (see below), whose sum is σ = 27526800. Its totient is φ = 13734528.

The previous prime is 20623439. The next prime is 20623453. The reversal of 20623443 is 34432602.

It is a happy number.

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

It is not a de Polignac number, because 20623443 - 2² = 20623439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20623453) 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, 343 + ... + 6431.

It is an arithmetic number, because the mean of its divisors is an integer number (3440850).

Almost surely, 2^20623443 is an apocalyptic number.

20623443 is a deficient number, since it is larger than the sum of its proper divisors (6903357).

20623443 is a wasteful number, since it uses less digits than its factorization.

20623443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7221.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 20623443 is about 4541.3041078527. The cubic root of 20623443 is about 274.2334265641.

The spelling of 20623443 in words is "twenty million, six hundred twenty-three thousand, four hundred forty-three".