21342093 has 8 divisors (see below), whose sum is σ = 28993248. Its totient is φ = 13959504.

The previous prime is 21342071. The next prime is 21342119. The reversal of 21342093 is 39024312.

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

It is not a de Polignac number, because 21342093 - 2¹³ = 21333901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66955 + ... + 67272.

It is an arithmetic number, because the mean of its divisors is an integer number (3624156).

Almost surely, 2^21342093 is an apocalyptic number.

It is an amenable number.

21342093 is a deficient number, since it is larger than the sum of its proper divisors (7651155).

21342093 is a wasteful number, since it uses less digits than its factorization.

21342093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134283.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 21342093 is about 4619.7503179284. The cubic root of 21342093 is about 277.3824646311.

The spelling of 21342093 in words is "twenty-one million, three hundred forty-two thousand, ninety-three".