21346045 has 8 divisors (see below), whose sum is σ = 29274624. Its totient is φ = 14637264.

The previous prime is 21346043. The next prime is 21346069. The reversal of 21346045 is 54064312.

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

It is a cyclic number.

It is not a de Polignac number, because 21346045 - 2¹ = 21346043 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21346043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304909 + ... + 304978.

It is an arithmetic number, because the mean of its divisors is an integer number (3659328).

Almost surely, 2^21346045 is an apocalyptic number.

It is an amenable number.

21346045 is a deficient number, since it is larger than the sum of its proper divisors (7928579).

21346045 is an equidigital number, since it uses as much as digits as its factorization.

21346045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609899.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 21346045 is about 4620.1780268730. The cubic root of 21346045 is about 277.3995849114.

The spelling of 21346045 in words is "twenty-one million, three hundred forty-six thousand, forty-five".