20944019 has 2 divisors, whose sum is σ = 20944020. Its totient is φ = 20944018.

The previous prime is 20943991. The next prime is 20944043. The reversal of 20944019 is 91044902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20944019 - 2⁸ = 20943763 is a prime.

It is a super-2 number, since 2×20944019² = 877303863744722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20943982 and 20944000.

It is not a weakly prime, because it can be changed into another prime (20944069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10472009 + 10472010.

It is an arithmetic number, because the mean of its divisors is an integer number (10472010).

Almost surely, 2^20944019 is an apocalyptic number.

20944019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20944019 is an equidigital number, since it uses as much as digits as its factorization.

20944019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 20944019 is about 4576.4635910275. The cubic root of 20944019 is about 275.6470449748.

The spelling of 20944019 in words is "twenty million, nine hundred forty-four thousand, nineteen".