21152361261433 has 16 divisors (see below), whose sum is σ = 21628449158400. Its totient is φ = 20681201414016.

The previous prime is 21152361261307. The next prime is 21152361261457. The reversal of 21152361261433 is 33416216325112.

It is a cyclic number.

It is not a de Polignac number, because 21152361261433 - 2²¹ = 21152359164281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21152361241433) 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, 12449085 + ... + 14045797.

It is an arithmetic number, because the mean of its divisors is an integer number (1351778072400).

Almost surely, 2^{21152361261433} is an apocalyptic number.

It is an amenable number.

21152361261433 is a deficient number, since it is larger than the sum of its proper divisors (476087896967).

21152361261433 is a wasteful number, since it uses less digits than its factorization.

21152361261433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598256.

The product of its digits is 155520, while the sum is 40.

Adding to 21152361261433 its reverse (33416216325112), we get a palindrome (54568577586545).

The spelling of 21152361261433 in words is "twenty-one trillion, one hundred fifty-two billion, three hundred sixty-one million, two hundred sixty-one thousand, four hundred thirty-three".