21631552062140 has 24 divisors (see below), whose sum is σ = 46653996070752. Its totient is φ = 8418766207680.

The previous prime is 21631552062097. The next prime is 21631552062149. The reversal of 21631552062140 is 4126025513612.

It is a junction number, because it is equal to n+sod(n) for n = 21631552062094 and 21631552062103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21631552062149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14615912816 + ... + 14615914295.

It is an arithmetic number, because the mean of its divisors is an integer number (1943916502948).

Almost surely, 2^{21631552062140} is an apocalyptic number.

21631552062140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21631552062140 is an abundant number, since it is smaller than the sum of its proper divisors (25022444008612).

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

21631552062140 is a wasteful number, since it uses less digits than its factorization.

21631552062140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29231827157 (or 29231827155 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

Adding to 21631552062140 its reverse (4126025513612), we get a palindrome (25757577575752).

The spelling of 21631552062140 in words is "twenty-one trillion, six hundred thirty-one billion, five hundred fifty-two million, sixty-two thousand, one hundred forty".