21488797306 has 16 divisors (see below), whose sum is σ = 32720506560. Its totient is φ = 10582022880.

The previous prime is 21488797303. The next prime is 21488797333. The reversal of 21488797306 is 60379788412.

It is not an unprimeable number, because it can be changed into a prime (21488797303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 894115 + ... + 917833.

It is an arithmetic number, because the mean of its divisors is an integer number (2045031660).

Almost surely, 2^21488797306 is an apocalyptic number.

21488797306 is a deficient number, since it is larger than the sum of its proper divisors (11231709254).

21488797306 is a wasteful number, since it uses less digits than its factorization.

21488797306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30549.

The product of its (nonzero) digits is 4064256, while the sum is 55.

The spelling of 21488797306 in words is "twenty-one billion, four hundred eighty-eight million, seven hundred ninety-seven thousand, three hundred six".