21354962048 has 96 divisors (see below), whose sum is σ = 49548594060. Its totient is φ = 9141092352.

The previous prime is 21354962039. The next prime is 21354962077. The reversal of 21354962048 is 84026945312.

It can be written as a sum of positive squares in 2 ways, for example, as 19178926144 + 2176035904 = 138488^2 + 46648^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7230140 + ... + 7233092.

Almost surely, 2^21354962048 is an apocalyptic number.

21354962048 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21354962048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24774297030).

21354962048 is an abundant number, since it is smaller than the sum of its proper divisors (28193632012).

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

21354962048 is a wasteful number, since it uses less digits than its factorization.

21354962048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4134 (or 4115 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 21354962048 in words is "twenty-one billion, three hundred fifty-four million, nine hundred sixty-two thousand, forty-eight".