21349528934944 has 96 divisors (see below), whose sum is σ = 50893389106560. Its totient is φ = 8606279282688.

The previous prime is 21349528934933. The next prime is 21349528934959. The reversal of 21349528934944 is 44943982594312.

It is a super-2 number, since 2×21349528934944² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (67) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 21349528934944.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4472662 + ... + 7918570.

It is an arithmetic number, because the mean of its divisors is an integer number (530139469860).

Almost surely, 2^{21349528934944} 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 21349528934944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25446694553280).

21349528934944 is an abundant number, since it is smaller than the sum of its proper divisors (29543860171616).

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

21349528934944 is a wasteful number, since it uses less digits than its factorization.

21349528934944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3447570 (or 3447562 counting only the distinct ones).

The product of its digits is 268738560, while the sum is 67.

The spelling of 21349528934944 in words is "twenty-one trillion, three hundred forty-nine billion, five hundred twenty-eight million, nine hundred thirty-four thousand, nine hundred forty-four".