21203689542048 has 432 divisors, whose sum is σ = 66442109557824. Its totient is φ = 6410089820160.

The previous prime is 21203689542019. The next prime is 21203689542073. The reversal of 21203689542048 is 84024598630212.

21203689542048 is a `hidden beast` number, since 2 + 1 + 20 + 36 + 8 + 9 + 542 + 0 + 48 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21203689541985 and 21203689542003.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 934442383 + ... + 934465073.

It is an arithmetic number, because the mean of its divisors is an integer number (153801179532).

Almost surely, 2^{21203689542048} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21203689542048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33221054778912).

21203689542048 is an abundant number, since it is smaller than the sum of its proper divisors (45238420015776).

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

21203689542048 is a wasteful number, since it uses less digits than its factorization.

21203689542048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23069 (or 23045 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 54.

The spelling of 21203689542048 in words is "twenty-one trillion, two hundred three billion, six hundred eighty-nine million, five hundred forty-two thousand, forty-eight".