21300022 has 4 divisors (see below), whose sum is σ = 31950036. Its totient is φ = 10650010.

The previous prime is 21299987. The next prime is 21300029. The reversal of 21300022 is 22000312.

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

It is a junction number, because it is equal to n+sod(n) for n = 21299981 and 21300008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5325004 + ... + 5325007.

It is an arithmetic number, because the mean of its divisors is an integer number (7987509).

Almost surely, 2^21300022 is an apocalyptic number.

21300022 is a deficient number, since it is larger than the sum of its proper divisors (10650014).

21300022 is a wasteful number, since it uses less digits than its factorization.

21300022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10650013.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 21300022 is about 4615.1946871178. The cubic root of 21300022 is about 277.2000796115.

Adding to 21300022 its reverse (22000312), we get a palindrome (43300334).

The spelling of 21300022 in words is "twenty-one million, three hundred thousand, twenty-two".