20043430253 has 48 divisors (see below), whose sum is σ = 27273542400. Its totient is φ = 14512942080.

The previous prime is 20043430249. The next prime is 20043430271. The reversal of 20043430253 is 35203434002.

It is not a de Polignac number, because 20043430253 - 2² = 20043430249 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 (20043430283) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 710033 + ... + 737721.

It is an arithmetic number, because the mean of its divisors is an integer number (568198800).

Almost surely, 2^20043430253 is an apocalyptic number.

It is an amenable number.

20043430253 is a deficient number, since it is larger than the sum of its proper divisors (7230112147).

20043430253 is a wasteful number, since it uses less digits than its factorization.

20043430253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27810 (or 27803 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 26.

Adding to 20043430253 its reverse (35203434002), we get a palindrome (55246864255).

The spelling of 20043430253 in words is "twenty billion, forty-three million, four hundred thirty thousand, two hundred fifty-three".