21192969 has 8 divisors (see below), whose sum is σ = 32294080. Its totient is φ = 12110256.

The previous prime is 21192967. The next prime is 21192989. The reversal of 21192969 is 96929112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21192969 - 2¹ = 21192967 is a prime.

It is a super-2 number, since 2×21192969² = 898283870069922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21192967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504574 + ... + 504615.

It is an arithmetic number, because the mean of its divisors is an integer number (4036760).

Almost surely, 2^21192969 is an apocalyptic number.

It is an amenable number.

21192969 is a deficient number, since it is larger than the sum of its proper divisors (11101111).

21192969 is a wasteful number, since it uses less digits than its factorization.

21192969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009199.

The product of its digits is 17496, while the sum is 39.

The square root of 21192969 is about 4603.5821921630. The cubic root of 21192969 is about 276.7349008327.

The spelling of 21192969 in words is "twenty-one million, one hundred ninety-two thousand, nine hundred sixty-nine".