20001214423 has 2 divisors, whose sum is σ = 20001214424. Its totient is φ = 20001214422.

The previous prime is 20001214397. The next prime is 20001214469. The reversal of 20001214423 is 32441210002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20001214423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20001214423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001214223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000607211 + 10000607212.

It is an arithmetic number, because the mean of its divisors is an integer number (10000607212).

Almost surely, 2^20001214423 is an apocalyptic number.

20001214423 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001214423 is an equidigital number, since it uses as much as digits as its factorization.

20001214423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20001214423 its reverse (32441210002), we get a palindrome (52442424425).

The spelling of 20001214423 in words is "twenty billion, one million, two hundred fourteen thousand, four hundred twenty-three".