20012443001 has 4 divisors (see below), whose sum is σ = 20013615972. Its totient is φ = 20011270032.

The previous prime is 20012442941. The next prime is 20012443019. The reversal of 20012443001 is 10034421002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8473386601 + 11539056400 = 92051^2 + 107420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20012443001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20012473001) 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, 560510 + ... + 595143.

It is an arithmetic number, because the mean of its divisors is an integer number (5003403993).

Almost surely, 2^20012443001 is an apocalyptic number.

It is an amenable number.

20012443001 is a deficient number, since it is larger than the sum of its proper divisors (1172971).

20012443001 is a wasteful number, since it uses less digits than its factorization.

20012443001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172970.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20012443001 its reverse (10034421002), we get a palindrome (30046864003).

The spelling of 20012443001 in words is "twenty billion, twelve million, four hundred forty-three thousand, one".