20438043 has 8 divisors (see below), whose sum is σ = 27280656. Its totient is φ = 13610400.

The previous prime is 20438027. The next prime is 20438051. The reversal of 20438043 is 34083402.

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

It is not a de Polignac number, because 20438043 - 2⁴ = 20438027 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20431043) 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, 28 + ... + 6393.

It is an arithmetic number, because the mean of its divisors is an integer number (3410082).

Almost surely, 2^20438043 is an apocalyptic number.

20438043 is a deficient number, since it is larger than the sum of its proper divisors (6842613).

20438043 is a wasteful number, since it uses less digits than its factorization.

20438043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7485.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 20438043 is about 4520.8453855446. The cubic root of 20438043 is about 273.4091865954.

The spelling of 20438043 in words is "twenty million, four hundred thirty-eight thousand, forty-three".