21374367 has 8 divisors (see below), whose sum is σ = 32570496. Its totient is φ = 12213912.

The previous prime is 21374357. The next prime is 21374377. The reversal of 21374367 is 76347312.

It is an interprime number because it is at equal distance from previous prime (21374357) and next prime (21374377).

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

It is not a de Polignac number, because 21374367 - 2⁴ = 21374351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21374357) 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, 508893 + ... + 508934.

It is an arithmetic number, because the mean of its divisors is an integer number (4071312).

Almost surely, 2^21374367 is an apocalyptic number.

21374367 is a deficient number, since it is larger than the sum of its proper divisors (11196129).

21374367 is a wasteful number, since it uses less digits than its factorization.

21374367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017837.

The product of its digits is 21168, while the sum is 33.

The square root of 21374367 is about 4623.2420442802. The cubic root of 21374367 is about 277.5222155739.

The spelling of 21374367 in words is "twenty-one million, three hundred seventy-four thousand, three hundred sixty-seven".