9943247420 has 24 divisors (see below), whose sum is σ = 21065610384. Its totient is φ = 3942100736.

The previous prime is 9943247411. The next prime is 9943247423. The reversal of 9943247420 is 247423499.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9943247423) 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, 2197574 + ... + 2202093.

It is an arithmetic number, because the mean of its divisors is an integer number (877733766).

Almost surely, 2^9943247420 is an apocalyptic number.

It is an amenable number.

9943247420 is an abundant number, since it is smaller than the sum of its proper divisors (11122362964).

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

9943247420 is a wasteful number, since it uses less digits than its factorization.

9943247420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4399789 (or 4399787 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 9943247420 is about 99715.8333465654. The cubic root of 9943247420 is about 2150.3512979240.

The spelling of 9943247420 in words is "nine billion, nine hundred forty-three million, two hundred forty-seven thousand, four hundred twenty".