21372914 has 4 divisors (see below), whose sum is σ = 32059374. Its totient is φ = 10686456.

The previous prime is 21372889. The next prime is 21372937. The reversal of 21372914 is 41927312.

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

It can be written as a sum of positive squares in only one way, i.e., 11868025 + 9504889 = 3445^2 + 3083^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5343227 + ... + 5343230.

Almost surely, 2^21372914 is an apocalyptic number.

21372914 is a deficient number, since it is larger than the sum of its proper divisors (10686460).

21372914 is a wasteful number, since it uses less digits than its factorization.

21372914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10686459.

The product of its digits is 3024, while the sum is 29.

The square root of 21372914 is about 4623.0849007995. The cubic root of 21372914 is about 277.5159269056.

The spelling of 21372914 in words is "twenty-one million, three hundred seventy-two thousand, nine hundred fourteen".