20423101019 has 2 divisors, whose sum is σ = 20423101020. Its totient is φ = 20423101018.

The previous prime is 20423101003. The next prime is 20423101031. The reversal of 20423101019 is 91010132402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20423101019 - 2⁴ = 20423101003 is a prime.

It is a super-2 number, since 2×20423101019² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20423100985 and 20423101003.

It is not a weakly prime, because it can be changed into another prime (20423101219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211550509 + 10211550510.

It is an arithmetic number, because the mean of its divisors is an integer number (10211550510).

Almost surely, 2^20423101019 is an apocalyptic number.

20423101019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20423101019 is an equidigital number, since it uses as much as digits as its factorization.

20423101019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 20423101019 in words is "twenty billion, four hundred twenty-three million, one hundred one thousand, nineteen".