9940569820 has 48 divisors (see below), whose sum is σ = 20992799520. Its totient is φ = 3953885184.

The previous prime is 9940569811. The next prime is 9940569829. The reversal of 9940569820 is 289650499.

It is an interprime number because it is at equal distance from previous prime (9940569811) and next prime (9940569829).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9940569829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3797152 + ... + 3799768.

It is an arithmetic number, because the mean of its divisors is an integer number (437349990).

Almost surely, 2^9940569820 is an apocalyptic number.

It is an amenable number.

9940569820 is an abundant number, since it is smaller than the sum of its proper divisors (11052229700).

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

9940569820 is a wasteful number, since it uses less digits than its factorization.

9940569820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3622 (or 3620 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 52.

The square root of 9940569820 is about 99702.4062899186. The cubic root of 9940569820 is about 2150.1582591274.

The spelling of 9940569820 in words is "nine billion, nine hundred forty million, five hundred sixty-nine thousand, eight hundred twenty".