21719092 has 6 divisors (see below), whose sum is σ = 38008418. Its totient is φ = 10859544.

The previous prime is 21719069. The next prime is 21719099. The reversal of 21719092 is 29091712.

It can be written as a sum of positive squares in only one way, i.e., 12208036 + 9511056 = 3494^2 + 3084^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21719099) 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, 2714883 + ... + 2714890.

Almost surely, 2^21719092 is an apocalyptic number.

It is an amenable number.

21719092 is a deficient number, since it is larger than the sum of its proper divisors (16289326).

21719092 is a wasteful number, since it uses less digits than its factorization.

21719092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5429777 (or 5429775 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 21719092 is about 4660.3746630502. The cubic root of 21719092 is about 279.0062219464.

The spelling of 21719092 in words is "twenty-one million, seven hundred nineteen thousand, ninety-two".