21347058 has 8 divisors (see below), whose sum is σ = 42694128. Its totient is φ = 7115684.

The previous prime is 21347047. The next prime is 21347069. The reversal of 21347058 is 85074312.

It is an interprime number because it is at equal distance from previous prime (21347047) and next prime (21347069).

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

21347058 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1778916 + ... + 1778927.

It is an arithmetic number, because the mean of its divisors is an integer number (5336766).

Almost surely, 2^21347058 is an apocalyptic number.

21347058 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21347058 is a wasteful number, since it uses less digits than its factorization.

21347058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3557848.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 21347058 is about 4620.2876533826. The cubic root of 21347058 is about 277.4039729426.

The spelling of 21347058 in words is "twenty-one million, three hundred forty-seven thousand, fifty-eight".