21422059 has 4 divisors (see below), whose sum is σ = 21436216. Its totient is φ = 21407904.

The previous prime is 21422053. The next prime is 21422077. The reversal of 21422059 is 95022412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21422059 - 2⁷ = 21421931 is a prime.

It is a super-2 number, since 2×21422059² = 917809223598962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21422053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4494 + ... + 7939.

It is an arithmetic number, because the mean of its divisors is an integer number (5359054).

Almost surely, 2^21422059 is an apocalyptic number.

21422059 is a deficient number, since it is larger than the sum of its proper divisors (14157).

21422059 is a wasteful number, since it uses less digits than its factorization.

21422059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14156.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 21422059 is about 4628.3970227283. The cubic root of 21422059 is about 277.7284713136.

The spelling of 21422059 in words is "twenty-one million, four hundred twenty-two thousand, fifty-nine".