21151601326 has 8 divisors (see below), whose sum is σ = 31728256560. Its totient is φ = 10575515808.

The previous prime is 21151601311. The next prime is 21151601329. The reversal of 21151601326 is 62310615112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21151601294 and 21151601303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21151601329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32706 + ... + 208261.

It is an arithmetic number, because the mean of its divisors is an integer number (3966032070).

Almost surely, 2^21151601326 is an apocalyptic number.

21151601326 is a deficient number, since it is larger than the sum of its proper divisors (10576655234).

21151601326 is a wasteful number, since it uses less digits than its factorization.

21151601326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284858.

The product of its (nonzero) digits is 2160, while the sum is 28.

The spelling of 21151601326 in words is "twenty-one billion, one hundred fifty-one million, six hundred one thousand, three hundred twenty-six".