99218920812 has 24 divisors (see below), whose sum is σ = 252557253312. Its totient is φ = 30066339600.

The previous prime is 99218920807. The next prime is 99218920817. The reversal of 99218920812 is 21802981299.

It is an interprime number because it is at equal distance from previous prime (99218920807) and next prime (99218920817).

It is not an unprimeable number, because it can be changed into a prime (99218920817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375829114 + ... + 375829377.

It is an arithmetic number, because the mean of its divisors is an integer number (10523218888).

Almost surely, 2^99218920812 is an apocalyptic number.

It is an amenable number.

99218920812 is an abundant number, since it is smaller than the sum of its proper divisors (153338332500).

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

99218920812 is a wasteful number, since it uses less digits than its factorization.

99218920812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751658509 (or 751658507 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 51.

The spelling of 99218920812 in words is "ninety-nine billion, two hundred eighteen million, nine hundred twenty thousand, eight hundred twelve".