21314992 has 10 divisors (see below), whose sum is σ = 41297828. Its totient is φ = 10657488.

The previous prime is 21314947. The next prime is 21314999. The reversal of 21314992 is 29941312.

It is not an unprimeable number, because it can be changed into a prime (21314999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 666078 + ... + 666109.

Almost surely, 2^21314992 is an apocalyptic number.

It is an amenable number.

21314992 is a deficient number, since it is larger than the sum of its proper divisors (19982836).

21314992 is a wasteful number, since it uses less digits than its factorization.

21314992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332195 (or 1332189 counting only the distinct ones).

The product of its digits is 3888, while the sum is 31.

The square root of 21314992 is about 4616.8162189977. The cubic root of 21314992 is about 277.2650046370.

The spelling of 21314992 in words is "twenty-one million, three hundred fourteen thousand, nine hundred ninety-two".