21062647630 has 8 divisors (see below), whose sum is σ = 37912765752. Its totient is φ = 8425059048.

The previous prime is 21062647553. The next prime is 21062647631. The reversal of 21062647630 is 3674626012.

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 21062647630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21062647631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1053132372 + ... + 1053132391.

It is an arithmetic number, because the mean of its divisors is an integer number (4739095719).

Almost surely, 2^21062647630 is an apocalyptic number.

21062647630 is a deficient number, since it is larger than the sum of its proper divisors (16850118122).

21062647630 is a wasteful number, since it uses less digits than its factorization.

21062647630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2106264770.

The product of its (nonzero) digits is 72576, while the sum is 37.

The spelling of 21062647630 in words is "twenty-one billion, sixty-two million, six hundred forty-seven thousand, six hundred thirty".