21998088174 has 8 divisors (see below), whose sum is σ = 43996176360. Its totient is φ = 7332696056.

The previous prime is 21998088173. The next prime is 21998088187. The reversal of 21998088174 is 47188089912.

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

21998088174 is an admirable number.

It is a super-2 number, since 2×21998088174² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21998088173) 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, 1833174009 + ... + 1833174020.

It is an arithmetic number, because the mean of its divisors is an integer number (5499522045).

Almost surely, 2^21998088174 is an apocalyptic number.

21998088174 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21998088174 is a wasteful number, since it uses less digits than its factorization.

21998088174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3666348034.

The product of its (nonzero) digits is 2322432, while the sum is 57.

The spelling of 21998088174 in words is "twenty-one billion, nine hundred ninety-eight million, eighty-eight thousand, one hundred seventy-four".