20002423423 has 2 divisors, whose sum is σ = 20002423424. Its totient is φ = 20002423422.

The previous prime is 20002423321. The next prime is 20002423439. The reversal of 20002423423 is 32432420002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20002423423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20002423394 and 20002423403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20002423123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001211711 + 10001211712.

It is an arithmetic number, because the mean of its divisors is an integer number (10001211712).

Almost surely, 2^20002423423 is an apocalyptic number.

20002423423 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002423423 is an equidigital number, since it uses as much as digits as its factorization.

20002423423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 22.

Adding to 20002423423 its reverse (32432420002), we get a palindrome (52434843425).

The spelling of 20002423423 in words is "twenty billion, two million, four hundred twenty-three thousand, four hundred twenty-three".