21052223104 has 64 divisors (see below), whose sum is σ = 47742022080. Its totient is φ = 9153126400.

The previous prime is 21052223077. The next prime is 21052223147. The reversal of 21052223104 is 40132225012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 292657 + ... + 357424.

It is an arithmetic number, because the mean of its divisors is an integer number (745969095).

Almost surely, 2^21052223104 is an apocalyptic number.

It is an amenable number.

21052223104 is an abundant number, since it is smaller than the sum of its proper divisors (26689798976).

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

21052223104 is a wasteful number, since it uses less digits than its factorization.

21052223104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650129 (or 650117 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 21052223104 its reverse (40132225012), we get a palindrome (61184448116).

The spelling of 21052223104 in words is "twenty-one billion, fifty-two million, two hundred twenty-three thousand, one hundred four".