21146113402 has 8 divisors (see below), whose sum is σ = 31722544800. Its totient is φ = 10571931804.

The previous prime is 21146113379. The next prime is 21146113447. The reversal of 21146113402 is 20431164112.

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

It is a super-2 number, since 2×21146113402² (a number of 21 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 538752 + ... + 576667.

It is an arithmetic number, because the mean of its divisors is an integer number (3965318100).

Almost surely, 2^21146113402 is an apocalyptic number.

21146113402 is a deficient number, since it is larger than the sum of its proper divisors (10576431398).

21146113402 is a wasteful number, since it uses less digits than its factorization.

21146113402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124900.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 21146113402 its reverse (20431164112), we get a palindrome (41577277514).

The spelling of 21146113402 in words is "twenty-one billion, one hundred forty-six million, one hundred thirteen thousand, four hundred two".