21534245133 has 32 divisors (see below), whose sum is σ = 30120076800. Its totient is φ = 13667490816.

The previous prime is 21534245101. The next prime is 21534245207. The reversal of 21534245133 is 33154243512.

It is not a de Polignac number, because 21534245133 - 2⁵ = 21534245101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21534245094 and 21534245103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21534245233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1931148 + ... + 1942266.

It is an arithmetic number, because the mean of its divisors is an integer number (941252400).

Almost surely, 2^21534245133 is an apocalyptic number.

It is an amenable number.

21534245133 is a deficient number, since it is larger than the sum of its proper divisors (8585831667).

21534245133 is a wasteful number, since it uses less digits than its factorization.

21534245133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11461.

The product of its digits is 43200, while the sum is 33.

Adding to 21534245133 its reverse (33154243512), we get a palindrome (54688488645).

The spelling of 21534245133 in words is "twenty-one billion, five hundred thirty-four million, two hundred forty-five thousand, one hundred thirty-three".