21724462133 has 4 divisors (see below), whose sum is σ = 23699413248. Its totient is φ = 19749511020.

The previous prime is 21724462127. The next prime is 21724462147. The reversal of 21724462133 is 33126442712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21724462133 - 2³⁰ = 20650720309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21724462093 and 21724462102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21724462633) 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, 987475541 + ... + 987475562.

It is an arithmetic number, because the mean of its divisors is an integer number (5924853312).

Almost surely, 2^21724462133 is an apocalyptic number.

It is an amenable number.

21724462133 is a deficient number, since it is larger than the sum of its proper divisors (1974951115).

21724462133 is a wasteful number, since it uses less digits than its factorization.

21724462133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1974951114.

The product of its digits is 48384, while the sum is 35.

The spelling of 21724462133 in words is "twenty-one billion, seven hundred twenty-four million, four hundred sixty-two thousand, one hundred thirty-three".