21202405039 has 8 divisors (see below), whose sum is σ = 21393199872. Its totient is φ = 21011665920.

The previous prime is 21202405013. The next prime is 21202405061. The reversal of 21202405039 is 93050420212.

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 21202405039 - 2⁷ = 21202404911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21202404998 and 21202405016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202405339) 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, 1311922 + ... + 1327984.

It is an arithmetic number, because the mean of its divisors is an integer number (2674149984).

Almost surely, 2^21202405039 is an apocalyptic number.

21202405039 is a deficient number, since it is larger than the sum of its proper divisors (190794833).

21202405039 is a wasteful number, since it uses less digits than its factorization.

21202405039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27857.

The product of its (nonzero) digits is 4320, while the sum is 28.

The spelling of 21202405039 in words is "twenty-one billion, two hundred two million, four hundred five thousand, thirty-nine".