21374814 has 32 divisors (see below), whose sum is σ = 45467136. Its totient is φ = 6675840.

The previous prime is 21374813. The next prime is 21374819. The reversal of 21374814 is 41847312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21374813) 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 15 ways as a sum of consecutive naturals, for example, 37149 + ... + 37719.

It is an arithmetic number, because the mean of its divisors is an integer number (1420848).

Almost surely, 2^21374814 is an apocalyptic number.

21374814 is an abundant number, since it is smaller than the sum of its proper divisors (24092322).

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

21374814 is a wasteful number, since it uses less digits than its factorization.

21374814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960.

The product of its digits is 5376, while the sum is 30.

The square root of 21374814 is about 4623.2903867268. The cubic root of 21374814 is about 277.5241501586.

The spelling of 21374814 in words is "twenty-one million, three hundred seventy-four thousand, eight hundred fourteen".