21514973 has 8 divisors (see below), whose sum is σ = 22986720. Its totient is φ = 20077200.

The previous prime is 21514963. The next prime is 21514993. The reversal of 21514973 is 37941512.

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

It is a cyclic number.

It is not a de Polignac number, because 21514973 - 2⁴ = 21514957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21514903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7178 + ... + 9723.

It is an arithmetic number, because the mean of its divisors is an integer number (2873340).

Almost surely, 2^21514973 is an apocalyptic number.

It is an amenable number.

21514973 is a deficient number, since it is larger than the sum of its proper divisors (1471747).

21514973 is a wasteful number, since it uses less digits than its factorization.

21514973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16987.

The product of its digits is 7560, while the sum is 32.

The square root of 21514973 is about 4638.4235468530. The cubic root of 21514973 is about 278.1294232011.

The spelling of 21514973 in words is "twenty-one million, five hundred fourteen thousand, nine hundred seventy-three".