21035325144 has 64 divisors (see below), whose sum is σ = 56643523200. Its totient is φ = 6488246016.

The previous prime is 21035325097. The next prime is 21035325167. The reversal of 21035325144 is 44152353012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 516789 + ... + 556004.

It is an arithmetic number, because the mean of its divisors is an integer number (885055050).

Almost surely, 2^21035325144 is an apocalyptic number.

21035325144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21035325144 is an abundant number, since it is smaller than the sum of its proper divisors (35608198056).

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

21035325144 is a wasteful number, since it uses less digits than its factorization.

21035325144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072864 (or 1072860 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 21035325144 its reverse (44152353012), we get a palindrome (65187678156).

The spelling of 21035325144 in words is "twenty-one billion, thirty-five million, three hundred twenty-five thousand, one hundred forty-four".