21432041153 has 8 divisors (see below), whose sum is σ = 21637211400. Its totient is φ = 21227143168.

The previous prime is 21432041131. The next prime is 21432041159. The reversal of 21432041153 is 35114023412.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 497423809 + 20934617344 = 22303^2 + 144688^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21432041153 - 2¹² = 21432037057 is a prime.

It is a super-4 number, since 4×21432041153⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21432041159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91913 + ... + 226521.

It is an arithmetic number, because the mean of its divisors is an integer number (2704651425).

Almost surely, 2^21432041153 is an apocalyptic number.

It is an amenable number.

21432041153 is a deficient number, since it is larger than the sum of its proper divisors (205170247).

21432041153 is a wasteful number, since it uses less digits than its factorization.

21432041153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136131.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 21432041153 its reverse (35114023412), we get a palindrome (56546064565).

The spelling of 21432041153 in words is "twenty-one billion, four hundred thirty-two million, forty-one thousand, one hundred fifty-three".