21196469 has 12 divisors (see below), whose sum is σ = 24777900. Its totient is φ = 18079488.

The previous prime is 21196453. The next prime is 21196481. The reversal of 21196469 is 96469112.

It can be written as a sum of positive squares in 2 ways, for example, as 15697444 + 5499025 = 3962^2 + 2345^2 .

It is not a de Polignac number, because 21196469 - 2⁴ = 21196453 is a prime.

It is a super-2 number, since 2×21196469² = 898580596135922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21196069) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10277 + ... + 12165.

It is an arithmetic number, because the mean of its divisors is an integer number (2064825).

Almost surely, 2^21196469 is an apocalyptic number.

It is an amenable number.

21196469 is a deficient number, since it is larger than the sum of its proper divisors (3581431).

21196469 is a wasteful number, since it uses less digits than its factorization.

21196469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2132 (or 2125 counting only the distinct ones).

The product of its digits is 23328, while the sum is 38.

The square root of 21196469 is about 4603.9623152237. The cubic root of 21196469 is about 276.7501341684.

The spelling of 21196469 in words is "twenty-one million, one hundred ninety-six thousand, four hundred sixty-nine".