21352525144006 has 32 divisors (see below), whose sum is σ = 37016286120000. Its totient is φ = 9048096617472.

The previous prime is 21352525144001. The next prime is 21352525144087. The reversal of 21352525144006 is 60044152525312.

It is a self number, because there is not a number n which added to its sum of digits gives 21352525144006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21352525144001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88830670 + ... + 89070718.

It is an arithmetic number, because the mean of its divisors is an integer number (1156758941250).

Almost surely, 2^{21352525144006} is an apocalyptic number.

21352525144006 is a deficient number, since it is larger than the sum of its proper divisors (15663760975994).

21352525144006 is a wasteful number, since it uses less digits than its factorization.

21352525144006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311536.

The product of its (nonzero) digits is 288000, while the sum is 40.

Adding to 21352525144006 its reverse (60044152525312), we get a palindrome (81396677669318).

The spelling of 21352525144006 in words is "twenty-one trillion, three hundred fifty-two billion, five hundred twenty-five million, one hundred forty-four thousand, six".