21442113402 has 8 divisors (see below), whose sum is σ = 42884226816. Its totient is φ = 7147371132.

The previous prime is 21442113391. The next prime is 21442113421. The reversal of 21442113402 is 20431124412.

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

21442113402 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1786842778 + ... + 1786842789.

It is an arithmetic number, because the mean of its divisors is an integer number (5360528352).

Almost surely, 2^21442113402 is an apocalyptic number.

21442113402 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.

21442113402 is a wasteful number, since it uses less digits than its factorization.

21442113402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3573685572.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21442113402 its reverse (20431124412), we get a palindrome (41873237814).

The spelling of 21442113402 in words is "twenty-one billion, four hundred forty-two million, one hundred thirteen thousand, four hundred two".