21022023244 has 48 divisors (see below), whose sum is σ = 39846854880. Its totient is φ = 9672998400.

The previous prime is 21022023229. The next prime is 21022023283. The reversal of 21022023244 is 44232022012.

It is a super-2 number, since 2×21022023244² (a number of 21 digits) contains 22 as substring.

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, 380992 + ... + 432664.

It is an arithmetic number, because the mean of its divisors is an integer number (830142810).

Almost surely, 2^21022023244 is an apocalyptic number.

It is an amenable number.

21022023244 is a deficient number, since it is larger than the sum of its proper divisors (18824831636).

21022023244 is a wasteful number, since it uses less digits than its factorization.

21022023244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51850 (or 51848 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 21022023244 its reverse (44232022012), we get a palindrome (65254045256).

The spelling of 21022023244 in words is "twenty-one billion, twenty-two million, twenty-three thousand, two hundred forty-four".