20469719 has 2 divisors, whose sum is σ = 20469720. Its totient is φ = 20469718.

The previous prime is 20469653. The next prime is 20469727. The reversal of 20469719 is 91796402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20469719 is a prime.

It is a super-2 number, since 2×20469719² = 838018791877922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20469739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10234859 + 10234860.

It is an arithmetic number, because the mean of its divisors is an integer number (10234860).

Almost surely, 2^20469719 is an apocalyptic number.

20469719 is a deficient number, since it is larger than the sum of its proper divisors (1).

20469719 is an equidigital number, since it uses as much as digits as its factorization.

20469719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 20469719 is about 4524.3473562493. The cubic root of 20469719 is about 273.5503618711.

The spelling of 20469719 in words is "twenty million, four hundred sixty-nine thousand, seven hundred nineteen".