21839400502 has 8 divisors (see below), whose sum is σ = 32827492800. Its totient is φ = 10896902904.

The previous prime is 21839400493. The next prime is 21839400563. The reversal of 21839400502 is 20500493812.

21839400502 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11397477 + ... + 11399392.

It is an arithmetic number, because the mean of its divisors is an integer number (4103436600).

Almost surely, 2^21839400502 is an apocalyptic number.

21839400502 is a deficient number, since it is larger than the sum of its proper divisors (10988092298).

21839400502 is a wasteful number, since it uses less digits than its factorization.

21839400502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22797350.

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 21839400502 in words is "twenty-one billion, eight hundred thirty-nine million, four hundred thousand, five hundred two".