21537425520076 has 48 divisors (see below), whose sum is σ = 39095978445216. Its totient is φ = 10374993667584.

The previous prime is 21537425520071. The next prime is 21537425520101. The reversal of 21537425520076 is 67002552473512.

It is not an unprimeable number, because it can be changed into a prime (21537425520071) by changing a digit.

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, 788730 + ... + 6610366.

It is an arithmetic number, because the mean of its divisors is an integer number (814499550942).

Almost surely, 2^{21537425520076} is an apocalyptic number.

It is an amenable number.

21537425520076 is a deficient number, since it is larger than the sum of its proper divisors (17558552925140).

21537425520076 is a wasteful number, since it uses less digits than its factorization.

21537425520076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5821978 (or 5821976 counting only the distinct ones).

The product of its (nonzero) digits is 3528000, while the sum is 49.

Adding to 21537425520076 its reverse (67002552473512), we get a palindrome (88539977993588).

The spelling of 21537425520076 in words is "twenty-one trillion, five hundred thirty-seven billion, four hundred twenty-five million, five hundred twenty thousand, seventy-six".