21425314 has 4 divisors (see below), whose sum is σ = 32137974. Its totient is φ = 10712656.

The previous prime is 21425311. The next prime is 21425317. The reversal of 21425314 is 41352412.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21425311) and next prime (21425317).

It can be written as a sum of positive squares in only one way, i.e., 15737089 + 5688225 = 3967^2 + 2385^2 .

It is not an unprimeable number, because it can be changed into a prime (21425311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5356327 + ... + 5356330.

Almost surely, 2^21425314 is an apocalyptic number.

21425314 is a deficient number, since it is larger than the sum of its proper divisors (10712660).

21425314 is a wasteful number, since it uses less digits than its factorization.

21425314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10712659.

The product of its digits is 960, while the sum is 22.

The square root of 21425314 is about 4628.7486429920. The cubic root of 21425314 is about 277.7425371945.

Adding to 21425314 its reverse (41352412), we get a palindrome (62777726).

The spelling of 21425314 in words is "twenty-one million, four hundred twenty-five thousand, three hundred fourteen".