22018905724039 has 4 divisors (see below), whose sum is σ = 25164463684624. Its totient is φ = 18873347763456.

The previous prime is 22018905724001. The next prime is 22018905724073. The reversal of 22018905724039 is 93042750981022.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22018905724039 - 2⁹ = 22018905723527 is a prime.

It is a super-4 number, since 4×22018905724039⁴ (a number of 54 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22018905724099) 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, 1572778980282 + ... + 1572778980295.

It is an arithmetic number, because the mean of its divisors is an integer number (6291115921156).

Almost surely, 2^{22018905724039} is an apocalyptic number.

22018905724039 is a deficient number, since it is larger than the sum of its proper divisors (3145557960585).

22018905724039 is an equidigital number, since it uses as much as digits as its factorization.

22018905724039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145557960584.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 22018905724039 in words is "twenty-two trillion, eighteen billion, nine hundred five million, seven hundred twenty-four thousand, thirty-nine".