30020143 has 4 divisors (see below), whose sum is σ = 30116368. Its totient is φ = 29923920.

The previous prime is 30020119. The next prime is 30020173. The reversal of 30020143 is 34102003.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30020143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30020173) 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, 47643 + ... + 48268.

It is an arithmetic number, because the mean of its divisors is an integer number (7529092).

Almost surely, 2^30020143 is an apocalyptic number.

30020143 is a deficient number, since it is larger than the sum of its proper divisors (96225).

30020143 is an equidigital number, since it uses as much as digits as its factorization.

30020143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96224.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 30020143 is about 5479.0640624107. The cubic root of 30020143 is about 310.7927783526.

Adding to 30020143 its reverse (34102003), we get a palindrome (64122146).

The spelling of 30020143 in words is "thirty million, twenty thousand, one hundred forty-three".