21652420242136 has 8 divisors (see below), whose sum is σ = 40598287954020. Its totient is φ = 10826210121064.

The previous prime is 21652420242121. The next prime is 21652420242151. The reversal of 21652420242136 is 63124202425612.

It is an interprime number because it is at equal distance from previous prime (21652420242121) and next prime (21652420242151).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1353276265126 + ... + 1353276265141.

Almost surely, 2^{21652420242136} is an apocalyptic number.

It is an amenable number.

21652420242136 is a deficient number, since it is larger than the sum of its proper divisors (18945867711884).

21652420242136 is a wasteful number, since it uses less digits than its factorization.

21652420242136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2706552530273 (or 2706552530269 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 40.

Adding to 21652420242136 its reverse (63124202425612), we get a palindrome (84776622667748).

The spelling of 21652420242136 in words is "twenty-one trillion, six hundred fifty-two billion, four hundred twenty million, two hundred forty-two thousand, one hundred thirty-six".