21153000263244 has 48 divisors (see below), whose sum is σ = 52344780969600. Its totient is φ = 6625514439936.

The previous prime is 21153000263207. The next prime is 21153000263273. The reversal of 21153000263244 is 44236200035112.

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, 83630734 + ... + 83883285.

It is an arithmetic number, because the mean of its divisors is an integer number (1090516270200).

Almost surely, 2^{21153000263244} is an apocalyptic number.

It is an amenable number.

21153000263244 is an abundant number, since it is smaller than the sum of its proper divisors (31191780706356).

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

21153000263244 is a wasteful number, since it uses less digits than its factorization.

21153000263244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167514662 (or 167514660 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 21153000263244 its reverse (44236200035112), we get a palindrome (65389200298356).

The spelling of 21153000263244 in words is "twenty-one trillion, one hundred fifty-three billion, two hundred sixty-three thousand, two hundred forty-four".