21353345153 has 16 divisors (see below), whose sum is σ = 25579094016. Its totient is φ = 17428554000.

The previous prime is 21353345147. The next prime is 21353345161. The reversal of 21353345153 is 35154335312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21353345153 - 2⁴ = 21353345137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21353345113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261473 + ... + 333278.

It is an arithmetic number, because the mean of its divisors is an integer number (1598693376).

Almost surely, 2^21353345153 is an apocalyptic number.

21353345153 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21353345153 is a deficient number, since it is larger than the sum of its proper divisors (4225748863).

21353345153 is a wasteful number, since it uses less digits than its factorization.

21353345153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595004.

The product of its digits is 81000, while the sum is 35.

The spelling of 21353345153 in words is "twenty-one billion, three hundred fifty-three million, three hundred forty-five thousand, one hundred fifty-three".