21443140202 has 16 divisors (see below), whose sum is σ = 35091252000. Its totient is φ = 9746193840.

The previous prime is 21443140193. The next prime is 21443140253. The reversal of 21443140202 is 20204134412.

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, 414449 + ... + 463307.

It is an arithmetic number, because the mean of its divisors is an integer number (2193203250).

Almost surely, 2^21443140202 is an apocalyptic number.

21443140202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21443140202 is a deficient number, since it is larger than the sum of its proper divisors (13648111798).

21443140202 is a wasteful number, since it uses less digits than its factorization.

21443140202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68821.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21443140202 its reverse (20204134412), we get a palindrome (41647274614).

The spelling of 21443140202 in words is "twenty-one billion, four hundred forty-three million, one hundred forty thousand, two hundred two".