21862022 has 16 divisors (see below), whose sum is σ = 40360992. Its totient is φ = 8648640.

The previous prime is 21861991. The next prime is 21862031. The reversal of 21862022 is 22026812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59879 + ... + 60242.

It is an arithmetic number, because the mean of its divisors is an integer number (2522562).

Almost surely, 2^21862022 is an apocalyptic number.

21862022 is a deficient number, since it is larger than the sum of its proper divisors (18498970).

21862022 is a wasteful number, since it uses less digits than its factorization.

21862022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120143.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 21862022 is about 4675.6841210672. The cubic root of 21862022 is about 279.6169165977.

Adding to 21862022 its reverse (22026812), we get a palindrome (43888834).

The spelling of 21862022 in words is "twenty-one million, eight hundred sixty-two thousand, twenty-two".