20004145523 has 2 divisors, whose sum is σ = 20004145524. Its totient is φ = 20004145522.

The previous prime is 20004145487. The next prime is 20004145529. The reversal of 20004145523 is 32554140002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20004145523 - 2¹⁴ = 20004129139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20004145492 and 20004145501.

It is not a weakly prime, because it can be changed into another prime (20004145529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10002072761 + 10002072762.

It is an arithmetic number, because the mean of its divisors is an integer number (10002072762).

Almost surely, 2^20004145523 is an apocalyptic number.

20004145523 is a deficient number, since it is larger than the sum of its proper divisors (1).

20004145523 is an equidigital number, since it uses as much as digits as its factorization.

20004145523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 20004145523 its reverse (32554140002), we get a palindrome (52558285525).

The spelling of 20004145523 in words is "twenty billion, four million, one hundred forty-five thousand, five hundred twenty-three".