21888698330 has 32 divisors (see below), whose sum is σ = 42339951936. Its totient is φ = 8117455104.

The previous prime is 21888698323. The next prime is 21888698353. The reversal of 21888698330 is 3389688812.

It is a super-2 number, since 2×21888698330² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 949484 + ... + 972263.

It is an arithmetic number, because the mean of its divisors is an integer number (1323123498).

Almost surely, 2^21888698330 is an apocalyptic number.

21888698330 is a deficient number, since it is larger than the sum of its proper divisors (20451253606).

21888698330 is a wasteful number, since it uses less digits than its factorization.

21888698330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921838.

The product of its (nonzero) digits is 3981312, while the sum is 56.

The spelling of 21888698330 in words is "twenty-one billion, eight hundred eighty-eight million, six hundred ninety-eight thousand, three hundred thirty".