9923996212 has 24 divisors (see below), whose sum is σ = 18784610600. Its totient is φ = 4560299136.

The previous prime is 9923996161. The next prime is 9923996221. The reversal of 9923996212 is 2126993299.

It can be written as a sum of positive squares in 4 ways, for example, as 2090684176 + 7833312036 = 45724^2 + 88506^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a self number, because there is not a number n which added to its sum of digits gives 9923996212.

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, 404787 + ... + 428602.

Almost surely, 2^9923996212 is an apocalyptic number.

It is an amenable number.

9923996212 is a deficient number, since it is larger than the sum of its proper divisors (8860614388).

9923996212 is a wasteful number, since it uses less digits than its factorization.

9923996212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833635 (or 833633 counting only the distinct ones).

The product of its digits is 944784, while the sum is 52.

The square root of 9923996212 is about 99619.2562309115. The cubic root of 9923996212 is about 2148.9626300369.

The spelling of 9923996212 in words is "nine billion, nine hundred twenty-three million, nine hundred ninety-six thousand, two hundred twelve".