21463642630 has 8 divisors (see below), whose sum is σ = 38634556752. Its totient is φ = 8585457048.

The previous prime is 21463642601. The next prime is 21463642631. The reversal of 21463642630 is 3624636412.

It is a happy number.

21463642630 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21463642630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21463642631) 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, 1073182122 + ... + 1073182141.

It is an arithmetic number, because the mean of its divisors is an integer number (4829319594).

Almost surely, 2^21463642630 is an apocalyptic number.

21463642630 is a deficient number, since it is larger than the sum of its proper divisors (17170914122).

21463642630 is a wasteful number, since it uses less digits than its factorization.

21463642630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146364270.

The product of its (nonzero) digits is 124416, while the sum is 37.

The spelling of 21463642630 in words is "twenty-one billion, four hundred sixty-three million, six hundred forty-two thousand, six hundred thirty".