21073126 has 8 divisors (see below), whose sum is σ = 31677120. Its totient is φ = 10514088.

The previous prime is 21073103. The next prime is 21073127. The reversal of 21073126 is 62137012.

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

It is a junction number, because it is equal to n+sod(n) for n = 21073097 and 21073106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21073127) 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 in 3 ways as a sum of consecutive naturals, for example, 10041 + ... + 11956.

It is an arithmetic number, because the mean of its divisors is an integer number (3959640).

Almost surely, 2^21073126 is an apocalyptic number.

21073126 is a deficient number, since it is larger than the sum of its proper divisors (10603994).

21073126 is a wasteful number, since it uses less digits than its factorization.

21073126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22478.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 21073126 is about 4590.5474619047. The cubic root of 21073126 is about 276.2122832969.

The spelling of 21073126 in words is "twenty-one million, seventy-three thousand, one hundred twenty-six".