21026419224 has 24 divisors (see below), whose sum is σ = 52567824060. Its totient is φ = 7008569616.

The previous prime is 21026419207. The next prime is 21026419229. The reversal of 21026419224 is 42291462012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×21026419224² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21026419229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 695577 + ... + 725175.

Almost surely, 2^21026419224 is an apocalyptic number.

21026419224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21026419224 is an abundant number, since it is smaller than the sum of its proper divisors (31541404836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21026419224 is an frugal number, since it uses more digits than its factorization.

21026419224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59207 (or 29604 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

Multiplying 21026419224 by its product of nonzero digits (13824), we get a square (290669219352576 = 17049024²).

The spelling of 21026419224 in words is "twenty-one billion, twenty-six million, four hundred nineteen thousand, two hundred twenty-four".