21113146506424 has 32 divisors (see below), whose sum is σ = 45258370773120. Its totient is φ = 9045308565216.

The previous prime is 21113146506421. The next prime is 21113146506443. The reversal of 21113146506424 is 42460564131112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113146506421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66147594 + ... + 66466009.

It is an arithmetic number, because the mean of its divisors is an integer number (1414324086660).

Almost surely, 2^{21113146506424} is an apocalyptic number.

It is an amenable number.

21113146506424 is an abundant number, since it is smaller than the sum of its proper divisors (24145224266696).

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

21113146506424 is a wasteful number, since it uses less digits than its factorization.

21113146506424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132616459 (or 132616455 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 21113146506424 in words is "twenty-one trillion, one hundred thirteen billion, one hundred forty-six million, five hundred six thousand, four hundred twenty-four".