21241723713654 has 16 divisors (see below), whose sum is σ = 42484058718192. Its totient is φ = 7080472689408.

The previous prime is 21241723713629. The next prime is 21241723713709. The reversal of 21241723713654 is 45631732714212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25018099 + ... + 25853214.

It is an arithmetic number, because the mean of its divisors is an integer number (2655253669887).

Almost surely, 2^{21241723713654} is an apocalyptic number.

21241723713654 is an abundant number, since it is smaller than the sum of its proper divisors (21242335004538).

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

21241723713654 is a wasteful number, since it uses less digits than its factorization.

21241723713654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50940911.

The product of its digits is 1693440, while the sum is 48.

The spelling of 21241723713654 in words is "twenty-one trillion, two hundred forty-one billion, seven hundred twenty-three million, seven hundred thirteen thousand, six hundred fifty-four".