21054652224 has 28 divisors (see below), whose sum is σ = 55707101184. Its totient is φ = 7018217344.

The previous prime is 21054652207. The next prime is 21054652243. The reversal of 21054652224 is 42225645012.

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 3 ways as a sum of consecutive naturals, for example, 54829632 + ... + 54830015.

It is an arithmetic number, because the mean of its divisors is an integer number (1989539328).

Almost surely, 2^21054652224 is an apocalyptic number.

21054652224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21054652224 is an abundant number, since it is smaller than the sum of its proper divisors (34652448960).

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

21054652224 is a wasteful number, since it uses less digits than its factorization.

21054652224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109659662 (or 109659652 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

The spelling of 21054652224 in words is "twenty-one billion, fifty-four million, six hundred fifty-two thousand, two hundred twenty-four".