20401030243 has 8 divisors (see below), whose sum is σ = 22264205040. Its totient is φ = 18539278080.

The previous prime is 20401030121. The next prime is 20401030249. The reversal of 20401030243 is 34203010402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20401030243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20401030243.

It is not an unprimeable number, because it can be changed into a prime (20401030249) 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, 325558 + ... + 383131.

It is an arithmetic number, because the mean of its divisors is an integer number (2783025630).

Almost surely, 2^20401030243 is an apocalyptic number.

20401030243 is a deficient number, since it is larger than the sum of its proper divisors (1863174797).

20401030243 is a wasteful number, since it uses less digits than its factorization.

20401030243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711317.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 20401030243 its reverse (34203010402), we get a palindrome (54604040645).

The spelling of 20401030243 in words is "twenty billion, four hundred one million, thirty thousand, two hundred forty-three".