21120469 has 2 divisors, whose sum is σ = 21120470. Its totient is φ = 21120468.

The previous prime is 21120461. The next prime is 21120479. The reversal of 21120469 is 96402112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11122225 + 9998244 = 3335^2 + 3162^2 .

It is a cyclic number.

It is not a de Polignac number, because 21120469 - 2³ = 21120461 is a prime.

It is a super-2 number, since 2×21120469² = 892148421559922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21120461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560234 + 10560235.

It is an arithmetic number, because the mean of its divisors is an integer number (10560235).

Almost surely, 2^21120469 is an apocalyptic number.

It is an amenable number.

21120469 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120469 is an equidigital number, since it uses as much as digits as its factorization.

21120469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 21120469 is about 4595.7011434600. The cubic root of 21120469 is about 276.4189752639.

The spelling of 21120469 in words is "twenty-one million, one hundred twenty thousand, four hundred sixty-nine".