21074093 has 2 divisors, whose sum is σ = 21074094. Its totient is φ = 21074092.

The previous prime is 21074089. The next prime is 21074099. The reversal of 21074093 is 39047012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14115049 + 6959044 = 3757^2 + 2638^2 .

It is a cyclic number.

It is not a de Polignac number, because 21074093 - 2² = 21074089 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21074099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10537046 + 10537047.

It is an arithmetic number, because the mean of its divisors is an integer number (10537047).

Almost surely, 2^21074093 is an apocalyptic number.

It is an amenable number.

21074093 is a deficient number, since it is larger than the sum of its proper divisors (1).

21074093 is an equidigital number, since it uses as much as digits as its factorization.

21074093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 21074093 is about 4590.6527858247. The cubic root of 21074093 is about 276.2165081596.

The spelling of 21074093 in words is "twenty-one million, seventy-four thousand, ninety-three".