23012520019 has 2 divisors, whose sum is σ = 23012520020. Its totient is φ = 23012520018.

The previous prime is 23012519987. The next prime is 23012520053. The reversal of 23012520019 is 91002521032.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23012520019 - 2⁵ = 23012519987 is a prime.

It is a super-2 number, since 2×23012520019² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23012519975 and 23012520002.

It is not a weakly prime, because it can be changed into another prime (23012520059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11506260009 + 11506260010.

It is an arithmetic number, because the mean of its divisors is an integer number (11506260010).

Almost surely, 2^23012520019 is an apocalyptic number.

23012520019 is a deficient number, since it is larger than the sum of its proper divisors (1).

23012520019 is an equidigital number, since it uses as much as digits as its factorization.

23012520019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The spelling of 23012520019 in words is "twenty-three billion, twelve million, five hundred twenty thousand, nineteen".