20146443 has 4 divisors (see below), whose sum is σ = 26861928. Its totient is φ = 13430960.

The previous prime is 20146433. The next prime is 20146453. The reversal of 20146443 is 34464102.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20146433) and next prime (20146453).

It is a cyclic number.

It is not a de Polignac number, because 20146443 - 2¹² = 20142347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20146433) 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, 3357738 + ... + 3357743.

It is an arithmetic number, because the mean of its divisors is an integer number (6715482).

Almost surely, 2^20146443 is an apocalyptic number.

20146443 is a deficient number, since it is larger than the sum of its proper divisors (6715485).

20146443 is an equidigital number, since it uses as much as digits as its factorization.

20146443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6715484.

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

The square root of 20146443 is about 4488.4789182974. The cubic root of 20146443 is about 272.1026636319.

The spelling of 20146443 in words is "twenty million, one hundred forty-six thousand, four hundred forty-three".