21424668231048 has 16 divisors (see below), whose sum is σ = 53561670577680. Its totient is φ = 7141556077008.

The previous prime is 21424668231047. The next prime is 21424668231053. The reversal of 21424668231048 is 84013286642412.

It is a super-2 number, since 2×21424668231048² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21424668231047) 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, 446347254790 + ... + 446347254837.

It is an arithmetic number, because the mean of its divisors is an integer number (3347604411105).

Almost surely, 2^{21424668231048} is an apocalyptic number.

It is an amenable number.

21424668231048 is an abundant number, since it is smaller than the sum of its proper divisors (32137002346632).

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

21424668231048 is a wasteful number, since it uses less digits than its factorization.

21424668231048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892694509636 (or 892694509632 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 51.

The spelling of 21424668231048 in words is "twenty-one trillion, four hundred twenty-four billion, six hundred sixty-eight million, two hundred thirty-one thousand, forty-eight".