20043619 has 2 divisors, whose sum is σ = 20043620. Its totient is φ = 20043618.

The previous prime is 20043599. The next prime is 20043623. The reversal of 20043619 is 91634002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20043619 is a prime.

It is a super-2 number, since 2×20043619² = 803493325234322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20043593 and 20043602.

It is not a weakly prime, because it can be changed into another prime (20040619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10021809 + 10021810.

It is an arithmetic number, because the mean of its divisors is an integer number (10021810).

Almost surely, 2^20043619 is an apocalyptic number.

20043619 is a deficient number, since it is larger than the sum of its proper divisors (1).

20043619 is an equidigital number, since it uses as much as digits as its factorization.

20043619 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 20043619 is about 4477.0100513624. The cubic root of 20043619 is about 271.6389520115.

The spelling of 20043619 in words is "twenty million, forty-three thousand, six hundred nineteen".