21050040344502 has 32 divisors (see below), whose sum is σ = 45359529153120. Its totient is φ = 6473938245120.

The previous prime is 21050040344467. The next prime is 21050040344561. The reversal of 21050040344502 is 20544304005012.

It is a self number, because there is not a number n which added to its sum of digits gives 21050040344502.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 62272977 + ... + 62610092.

It is an arithmetic number, because the mean of its divisors is an integer number (1417485286035).

Almost surely, 2^{21050040344502} is an apocalyptic number.

21050040344502 is an abundant number, since it is smaller than the sum of its proper divisors (24309488808618).

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

21050040344502 is a wasteful number, since it uses less digits than its factorization.

21050040344502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124885248.

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 21050040344502 its reverse (20544304005012), we get a palindrome (41594344349514).

The spelling of 21050040344502 in words is "twenty-one trillion, fifty billion, forty million, three hundred forty-four thousand, five hundred two".