21402213088 has 24 divisors (see below), whose sum is σ = 42161831208. Its totient is φ = 10694446464.

The previous prime is 21402213083. The next prime is 21402213089. The reversal of 21402213088 is 88031220412.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21402213083) 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, 155706 + ... + 258937.

It is an arithmetic number, because the mean of its divisors is an integer number (1756742967).

Almost surely, 2^21402213088 is an apocalyptic number.

It is an amenable number.

21402213088 is a deficient number, since it is larger than the sum of its proper divisors (20759618120).

21402213088 is a wasteful number, since it uses less digits than its factorization.

21402213088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416266 (or 416258 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The spelling of 21402213088 in words is "twenty-one billion, four hundred two million, two hundred thirteen thousand, eighty-eight".