21402034112 has 56 divisors (see below), whose sum is σ = 45795377040. Its totient is φ = 9890519040.

The previous prime is 21402034109. The next prime is 21402034127. The reversal of 21402034112 is 21143020412.

It is a congruent number.

It is an unprimeable number.

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, 164783 + ... + 264494.

It is an arithmetic number, because the mean of its divisors is an integer number (817774590).

Almost surely, 2^21402034112 is an apocalyptic number.

It is an amenable number.

21402034112 is an abundant number, since it is smaller than the sum of its proper divisors (24393342928).

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

21402034112 is a wasteful number, since it uses less digits than its factorization.

21402034112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429349 (or 429339 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21402034112 its reverse (21143020412), we get a palindrome (42545054524).

The spelling of 21402034112 in words is "twenty-one billion, four hundred two million, thirty-four thousand, one hundred twelve".