21913497749696 has 112 divisors (see below), whose sum is σ = 50400520699392. Its totient is φ = 9258510643200.

The previous prime is 21913497749677. The next prime is 21913497749699. The reversal of 21913497749696 is 69694779431912.

21913497749696 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (112).

It is not an unprimeable number, because it can be changed into a prime (21913497749699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 716650760 + ... + 716681336.

Almost surely, 2^{21913497749696} 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 21913497749696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25200260349696).

21913497749696 is an abundant number, since it is smaller than the sum of its proper divisors (28487022949696).

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

21913497749696 is a wasteful number, since it uses less digits than its factorization.

21913497749696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53198 (or 53188 counting only the distinct ones).

The product of its digits is 1111065984, while the sum is 77.

The spelling of 21913497749696 in words is "twenty-one trillion, nine hundred thirteen billion, four hundred ninety-seven million, seven hundred forty-nine thousand, six hundred ninety-six".