9910921898 has 32 divisors (see below), whose sum is σ = 15806638080. Its totient is φ = 4652398080.

The previous prime is 9910921871. The next prime is 9910921963. The reversal of 9910921898 is 8981290199.

It is a super-3 number, since 3×9910921898³ (a number of 31 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 803663 + ... + 815901.

It is an arithmetic number, because the mean of its divisors is an integer number (493957440).

Almost surely, 2^9910921898 is an apocalyptic number.

9910921898 is a deficient number, since it is larger than the sum of its proper divisors (5895716182).

9910921898 is a wasteful number, since it uses less digits than its factorization.

9910921898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12662.

The product of its (nonzero) digits is 839808, while the sum is 56.

The square root of 9910921898 is about 99553.6131840527. The cubic root of 9910921898 is about 2148.0185023207.

The spelling of 9910921898 in words is "nine billion, nine hundred ten million, nine hundred twenty-one thousand, eight hundred ninety-eight".