21902350555039 has 4 divisors (see below), whose sum is σ = 21909802871880. Its totient is φ = 21894898238200.

The previous prime is 21902350555031. The next prime is 21902350555061. The reversal of 21902350555039 is 93055505320912.

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 21902350555039 - 2³ = 21902350555031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21902350554983 and 21902350555001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21902350555031) 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, 3726154012 + ... + 3726159889.

It is an arithmetic number, because the mean of its divisors is an integer number (5477450717970).

Almost surely, 2^{21902350555039} is an apocalyptic number.

21902350555039 is a deficient number, since it is larger than the sum of its proper divisors (7452316841).

21902350555039 is an equidigital number, since it uses as much as digits as its factorization.

21902350555039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7452316840.

The product of its (nonzero) digits is 1822500, while the sum is 49.

The spelling of 21902350555039 in words is "twenty-one trillion, nine hundred two billion, three hundred fifty million, five hundred fifty-five thousand, thirty-nine".