21111842249736 has 96 divisors (see below), whose sum is σ = 61718133358080. Its totient is φ = 6000373948800.

The previous prime is 21111842249717. The next prime is 21111842249737. The reversal of 21111842249736 is 63794224811112.

It is not an unprimeable number, because it can be changed into a prime (21111842249737) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46770795 + ... + 47220026.

It is an arithmetic number, because the mean of its divisors is an integer number (642897222480).

Almost surely, 2^{21111842249736} is an apocalyptic number.

It is an amenable number.

21111842249736 is an abundant number, since it is smaller than the sum of its proper divisors (40606291108344).

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

21111842249736 is a wasteful number, since it uses less digits than its factorization.

21111842249736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93991035 (or 93991024 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 51.

The spelling of 21111842249736 in words is "twenty-one trillion, one hundred eleven billion, eight hundred forty-two million, two hundred forty-nine thousand, seven hundred thirty-six".