21000202340144 has 40 divisors (see below), whose sum is σ = 43825391691840. Its totient is φ = 9716127882048.

The previous prime is 21000202340129. The next prime is 21000202340189. The reversal of 21000202340144 is 44104320200012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 803238242 + ... + 803264385.

It is an arithmetic number, because the mean of its divisors is an integer number (1095634792296).

Almost surely, 2^{21000202340144} is an apocalyptic number.

It is an amenable number.

21000202340144 is an abundant number, since it is smaller than the sum of its proper divisors (22825189351696).

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

21000202340144 is a wasteful number, since it uses less digits than its factorization.

21000202340144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606502697 (or 1606502691 counting only the distinct ones).

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

Adding to 21000202340144 its reverse (44104320200012), we get a palindrome (65104522540156).

The spelling of 21000202340144 in words is "twenty-one trillion, two hundred two million, three hundred forty thousand, one hundred forty-four".