21011344469748 has 96 divisors (see below), whose sum is σ = 57480962515200. Its totient is φ = 6623996493312.

The previous prime is 21011344469723. The next prime is 21011344469779. The reversal of 21011344469748 is 84796444311012.

It is a happy number.

21011344469748 is a `hidden beast` number, since 2 + 1 + 0 + 1 + 134 + 4 + 469 + 7 + 48 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 21011344469694 and 21011344469703.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47299561 + ... + 47741712.

It is an arithmetic number, because the mean of its divisors is an integer number (598760026200).

Almost surely, 2^{21011344469748} is an apocalyptic number.

It is an amenable number.

21011344469748 is an abundant number, since it is smaller than the sum of its proper divisors (36469618045452).

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

21011344469748 is a wasteful number, since it uses less digits than its factorization.

21011344469748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95041398 (or 95041390 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 21011344469748 in words is "twenty-one trillion, eleven billion, three hundred forty-four million, four hundred sixty-nine thousand, seven hundred forty-eight".