21490322830 has 8 divisors (see below), whose sum is σ = 38682581112. Its totient is φ = 8596129128.

The previous prime is 21490322827. The next prime is 21490322831. The reversal of 21490322830 is 3822309412.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21490322831) 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, 1074516132 + ... + 1074516151.

It is an arithmetic number, because the mean of its divisors is an integer number (4835322639).

Almost surely, 2^21490322830 is an apocalyptic number.

21490322830 is a deficient number, since it is larger than the sum of its proper divisors (17192258282).

21490322830 is a wasteful number, since it uses less digits than its factorization.

21490322830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149032290.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 21490322830 in words is "twenty-one billion, four hundred ninety million, three hundred twenty-two thousand, eight hundred thirty".