21348274 has 8 divisors (see below), whose sum is σ = 33055488. Its totient is φ = 10329780.

The previous prime is 21348259. The next prime is 21348281. The reversal of 21348274 is 47284312.

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

It is a super-4 number, since 4×21348274⁴ (a number of 30 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 172102 + ... + 172225.

It is an arithmetic number, because the mean of its divisors is an integer number (4131936).

Almost surely, 2^21348274 is an apocalyptic number.

21348274 is a deficient number, since it is larger than the sum of its proper divisors (11707214).

21348274 is a wasteful number, since it uses less digits than its factorization.

21348274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344360.

The product of its digits is 10752, while the sum is 31.

The square root of 21348274 is about 4620.4192450469. The cubic root of 21348274 is about 277.4092401294.

The spelling of 21348274 in words is "twenty-one million, three hundred forty-eight thousand, two hundred seventy-four".