21654130424 has 8 divisors (see below), whose sum is σ = 40601494560. Its totient is φ = 10827065208.

The previous prime is 21654130403. The next prime is 21654130427. The reversal of 21654130424 is 42403145612.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21654130427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1353383144 + ... + 1353383159.

It is an arithmetic number, because the mean of its divisors is an integer number (5075186820).

Almost surely, 2^21654130424 is an apocalyptic number.

It is an amenable number.

21654130424 is a deficient number, since it is larger than the sum of its proper divisors (18947364136).

21654130424 is a wasteful number, since it uses less digits than its factorization.

21654130424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2706766309 (or 2706766305 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 21654130424 in words is "twenty-one billion, six hundred fifty-four million, one hundred thirty thousand, four hundred twenty-four".