20010043 has 4 divisors (see below), whose sum is σ = 20132968. Its totient is φ = 19887120.

The previous prime is 20010041. The next prime is 20010061. The reversal of 20010043 is 34001002.

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 20010043 - 2¹ = 20010041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20010041) 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, 61218 + ... + 61543.

It is an arithmetic number, because the mean of its divisors is an integer number (5033242).

Almost surely, 2^20010043 is an apocalyptic number.

20010043 is a deficient number, since it is larger than the sum of its proper divisors (122925).

20010043 is a wasteful number, since it uses less digits than its factorization.

20010043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122924.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 20010043 is about 4473.2586556111. The cubic root of 20010043 is about 271.4871888835.

Adding to 20010043 its reverse (34001002), we get a palindrome (54011045).

The spelling of 20010043 in words is "twenty million, ten thousand, forty-three".