21163342153654 has 8 divisors (see below), whose sum is σ = 31745040409368. Its totient is φ = 10581662017200.

The previous prime is 21163342153651. The next prime is 21163342153703. The reversal of 21163342153654 is 45635124336112.

It is a happy number.

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

It is a super-2 number, since 2×21163342153654² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21163342153651) 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, 1086247 + ... + 6595954.

It is an arithmetic number, because the mean of its divisors is an integer number (3968130051171).

Almost surely, 2^{21163342153654} is an apocalyptic number.

21163342153654 is a deficient number, since it is larger than the sum of its proper divisors (10581698255714).

21163342153654 is a wasteful number, since it uses less digits than its factorization.

21163342153654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9059630.

The product of its digits is 1555200, while the sum is 46.

Adding to 21163342153654 its reverse (45635124336112), we get a palindrome (66798466489766).

The spelling of 21163342153654 in words is "twenty-one trillion, one hundred sixty-three billion, three hundred forty-two million, one hundred fifty-three thousand, six hundred fifty-four".