24722021 has 8 divisors (see below), whose sum is σ = 26136000. Its totient is φ = 23319360.

The previous prime is 24721997. The next prime is 24722053. The reversal of 24722021 is 12022742.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24722021 is a prime.

It is a super-2 number, since 2×24722021² = 1222356644648882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 24721984 and 24722002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24722081) 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, 1880 + ... + 7278.

It is an arithmetic number, because the mean of its divisors is an integer number (3267000).

Almost surely, 2^24722021 is an apocalyptic number.

It is an amenable number.

24722021 is a deficient number, since it is larger than the sum of its proper divisors (1413979).

24722021 is a wasteful number, since it uses less digits than its factorization.

24722021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5659.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 24722021 is about 4972.1243950650. The cubic root of 24722021 is about 291.3139779754.

Adding to 24722021 its reverse (12022742), we get a palindrome (36744763).

The spelling of 24722021 in words is "twenty-four million, seven hundred twenty-two thousand, twenty-one".