21134374 has 8 divisors (see below), whose sum is σ = 32724288. Its totient is φ = 10226280.

The previous prime is 21134369. The next prime is 21134387. The reversal of 21134374 is 47343112.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170377 + ... + 170500.

It is an arithmetic number, because the mean of its divisors is an integer number (4090536).

Almost surely, 2^21134374 is an apocalyptic number.

21134374 is a deficient number, since it is larger than the sum of its proper divisors (11589914).

21134374 is a wasteful number, since it uses less digits than its factorization.

21134374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340910.

The product of its digits is 2016, while the sum is 25.

The square root of 21134374 is about 4597.2137213752. The cubic root of 21134374 is about 276.4796235803.

Adding to 21134374 its reverse (47343112), we get a palindrome (68477486).

The spelling of 21134374 in words is "twenty-one million, one hundred thirty-four thousand, three hundred seventy-four".