20253143423 has 4 divisors (see below), whose sum is σ = 21319098360. Its totient is φ = 19187188488.

The previous prime is 20253143399. The next prime is 20253143429. The reversal of 20253143423 is 32434135202.

It is a happy number.

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 20253143423 - 2⁶ = 20253143359 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 (20253143429) 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, 532977440 + ... + 532977477.

It is an arithmetic number, because the mean of its divisors is an integer number (5329774590).

Almost surely, 2^20253143423 is an apocalyptic number.

20253143423 is a deficient number, since it is larger than the sum of its proper divisors (1065954937).

20253143423 is a wasteful number, since it uses less digits than its factorization.

20253143423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065954936.

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 20253143423 its reverse (32434135202), we get a palindrome (52687278625).

The spelling of 20253143423 in words is "twenty billion, two hundred fifty-three million, one hundred forty-three thousand, four hundred twenty-three".