9921206354 has 8 divisors (see below), whose sum is σ = 15528844800. Its totient is φ = 4744924756.

The previous prime is 9921206353. The next prime is 9921206387. The reversal of 9921206354 is 4536021299.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (9921206353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107839154 + ... + 107839245.

It is an arithmetic number, because the mean of its divisors is an integer number (1941105600).

Almost surely, 2^9921206354 is an apocalyptic number.

9921206354 is a deficient number, since it is larger than the sum of its proper divisors (5607638446).

9921206354 is a wasteful number, since it uses less digits than its factorization.

9921206354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215678424.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 9921206354 is about 99605.2526426192. The cubic root of 9921206354 is about 2148.7612372932.

The spelling of 9921206354 in words is "nine billion, nine hundred twenty-one million, two hundred six thousand, three hundred fifty-four".