21652420242102 has 32 divisors (see below), whose sum is σ = 46809350068320. Its totient is φ = 6637516293120.

The previous prime is 21652420241941. The next prime is 21652420242119. The reversal of 21652420242102 is 20124202425612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 515955099 + ... + 515997062.

It is an arithmetic number, because the mean of its divisors is an integer number (1462792189635).

Almost surely, 2^{21652420242102} is an apocalyptic number.

21652420242102 is an abundant number, since it is smaller than the sum of its proper divisors (25156929826218).

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

21652420242102 is a wasteful number, since it uses less digits than its factorization.

21652420242102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031952448.

The product of its (nonzero) digits is 30720, while the sum is 33.

Adding to 21652420242102 its reverse (20124202425612), we get a palindrome (41776622667714).

The spelling of 21652420242102 in words is "twenty-one trillion, six hundred fifty-two billion, four hundred twenty million, two hundred forty-two thousand, one hundred two".