21014952 has 64 divisors (see below), whose sum is σ = 60971520. Its totient is φ = 5911488.

The previous prime is 21014951. The next prime is 21014957. The reversal of 21014952 is 25941012.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (21014951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10323 + ... + 12189.

It is an arithmetic number, because the mean of its divisors is an integer number (952680).

Almost surely, 2^21014952 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21014952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30485760).

21014952 is an abundant number, since it is smaller than the sum of its proper divisors (39956568).

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

21014952 is a wasteful number, since it uses less digits than its factorization.

21014952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1950 (or 1946 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 21014952 is about 4584.2068016179. The cubic root of 21014952 is about 275.9578805712.

Adding to 21014952 its reverse (25941012), we get a palindrome (46955964).

The spelling of 21014952 in words is "twenty-one million, fourteen thousand, nine hundred fifty-two".