20969419 has 2 divisors, whose sum is σ = 20969420. Its totient is φ = 20969418.

The previous prime is 20969413. The next prime is 20969437. The reversal of 20969419 is 91496902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20969419 - 2³ = 20969411 is a prime.

It is a super-2 number, since 2×20969419² = 879433066395122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20969411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10484709 + 10484710.

It is an arithmetic number, because the mean of its divisors is an integer number (10484710).

Almost surely, 2^20969419 is an apocalyptic number.

20969419 is a deficient number, since it is larger than the sum of its proper divisors (1).

20969419 is an equidigital number, since it uses as much as digits as its factorization.

20969419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 20969419 is about 4579.2378186768. The cubic root of 20969419 is about 275.7584308953.

The spelling of 20969419 in words is "twenty million, nine hundred sixty-nine thousand, four hundred nineteen".