21858224753 has 8 divisors (see below), whose sum is σ = 22490002080. Its totient is φ = 21231145120.

The previous prime is 21858224749. The next prime is 21858224761. The reversal of 21858224753 is 35742285812.

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 21858224753 - 2² = 21858224749 is a prime.

It is a super-2 number, since 2×21858224753² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21858224698 and 21858224707.

It is not an unprimeable number, because it can be changed into a prime (21858224783) 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, 1164983 + ... + 1183596.

It is an arithmetic number, because the mean of its divisors is an integer number (2811250260).

Almost surely, 2^21858224753 is an apocalyptic number.

It is an amenable number.

21858224753 is a deficient number, since it is larger than the sum of its proper divisors (631777327).

21858224753 is a wasteful number, since it uses less digits than its factorization.

21858224753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2348847.

The product of its digits is 1075200, while the sum is 47.

The spelling of 21858224753 in words is "twenty-one billion, eight hundred fifty-eight million, two hundred twenty-four thousand, seven hundred fifty-three".