9920981244 has 24 divisors (see below), whose sum is σ = 24510660048. Its totient is φ = 3112464640.

The previous prime is 9920981221. The next prime is 9920981251. The reversal of 9920981244 is 4421890299.

It is a junction number, because it is equal to n+sod(n) for n = 9920981193 and 9920981202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24315927 + ... + 24316334.

It is an arithmetic number, because the mean of its divisors is an integer number (1021277502).

Almost surely, 2^9920981244 is an apocalyptic number.

It is an amenable number.

9920981244 is an abundant number, since it is smaller than the sum of its proper divisors (14589678804).

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

9920981244 is a wasteful number, since it uses less digits than its factorization.

9920981244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48632285 (or 48632283 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 9920981244 is about 99604.1226255219. The cubic root of 9920981244 is about 2148.7449855296.

The spelling of 9920981244 in words is "nine billion, nine hundred twenty million, nine hundred eighty-one thousand, two hundred forty-four".