21202948816 has 40 divisors (see below), whose sum is σ = 47405231744. Its totient is φ = 8998750080.

The previous prime is 21202948763. The next prime is 21202948817. The reversal of 21202948816 is 61884920212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202948817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 907455 + ... + 930526.

Almost surely, 2^21202948816 is an apocalyptic number.

It is an amenable number.

21202948816 is an abundant number, since it is smaller than the sum of its proper divisors (26202282928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21202948816 is a wasteful number, since it uses less digits than its factorization.

21202948816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1838099 (or 1838093 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The spelling of 21202948816 in words is "twenty-one billion, two hundred two million, nine hundred forty-eight thousand, eight hundred sixteen".