20436019 has 2 divisors, whose sum is σ = 20436020. Its totient is φ = 20436018.

The previous prime is 20435993. The next prime is 20436041. The reversal of 20436019 is 91063402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20436019 - 2¹¹ = 20433971 is a prime.

It is a super-2 number, since 2×20436019² = 835261745136722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20435984 and 20436002.

It is not a weakly prime, because it can be changed into another prime (20436049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10218009 + 10218010.

It is an arithmetic number, because the mean of its divisors is an integer number (10218010).

Almost surely, 2^20436019 is an apocalyptic number.

20436019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20436019 is an equidigital number, since it uses as much as digits as its factorization.

20436019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 20436019 is about 4520.6215280645. The cubic root of 20436019 is about 273.4001609684.

The spelling of 20436019 in words is "twenty million, four hundred thirty-six thousand, nineteen".