21162107260637 has 48 divisors (see below), whose sum is σ = 26099137459008. Its totient is φ = 17049746972160.

The previous prime is 21162107260627. The next prime is 21162107260643. The reversal of 21162107260637 is 73606270126112.

It is a happy number.

It is not a de Polignac number, because 21162107260637 - 2⁶ = 21162107260573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21162107260607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3292685018 + ... + 3292691444.

It is an arithmetic number, because the mean of its divisors is an integer number (543732030396).

Almost surely, 2^{21162107260637} is an apocalyptic number.

It is an amenable number.

21162107260637 is a deficient number, since it is larger than the sum of its proper divisors (4937030198371).

21162107260637 is a wasteful number, since it uses less digits than its factorization.

21162107260637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10986 (or 10979 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 44.

Adding to 21162107260637 its reverse (73606270126112), we get a palindrome (94768377386749).

The spelling of 21162107260637 in words is "twenty-one trillion, one hundred sixty-two billion, one hundred seven million, two hundred sixty thousand, six hundred thirty-seven".