21004423022 has 32 divisors (see below), whose sum is σ = 35185138560. Its totient is φ = 9321469920.

The previous prime is 21004423019. The next prime is 21004423039. The reversal of 21004423022 is 22032440012.

It is a super-2 number, since 2×21004423022² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21004422985 and 21004423003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4276304 + ... + 4281212.

It is an arithmetic number, because the mean of its divisors is an integer number (1099535580).

Almost surely, 2^21004423022 is an apocalyptic number.

21004423022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21004423022 is a deficient number, since it is larger than the sum of its proper divisors (14180715538).

21004423022 is a wasteful number, since it uses less digits than its factorization.

21004423022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9488.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21004423022 its reverse (22032440012), we get a palindrome (43036863034).

The spelling of 21004423022 in words is "twenty-one billion, four million, four hundred twenty-three thousand, twenty-two".