21113524554136 has 16 divisors (see below), whose sum is σ = 45243266901840. Its totient is φ = 9048653380320.

The previous prime is 21113524554131. The next prime is 21113524554137. The reversal of 21113524554136 is 63145542531112.

It is a junction number, because it is equal to n+sod(n) for n = 21113524554092 and 21113524554101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113524554131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188513612035 + ... + 188513612146.

It is an arithmetic number, because the mean of its divisors is an integer number (2827704181365).

Almost surely, 2^{21113524554136} is an apocalyptic number.

It is an amenable number.

21113524554136 is an abundant number, since it is smaller than the sum of its proper divisors (24129742347704).

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

21113524554136 is a wasteful number, since it uses less digits than its factorization.

21113524554136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377027224194 (or 377027224190 counting only the distinct ones).

The product of its digits is 432000, while the sum is 43.

The spelling of 21113524554136 in words is "twenty-one trillion, one hundred thirteen billion, five hundred twenty-four million, five hundred fifty-four thousand, one hundred thirty-six".