21315382704238 has 32 divisors (see below), whose sum is σ = 36569547786240. Its totient is φ = 9127943818560.

The previous prime is 21315382704223. The next prime is 21315382704247. The reversal of 21315382704238 is 83240728351312.

It is a junction number, because it is equal to n+sod(n) for n = 21315382704191 and 21315382704200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95748178 + ... + 95970538.

It is an arithmetic number, because the mean of its divisors is an integer number (1142798368320).

Almost surely, 2^{21315382704238} is an apocalyptic number.

21315382704238 is a deficient number, since it is larger than the sum of its proper divisors (15254165082002).

21315382704238 is a wasteful number, since it uses less digits than its factorization.

21315382704238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227752.

The product of its (nonzero) digits is 1935360, while the sum is 49.

The spelling of 21315382704238 in words is "twenty-one trillion, three hundred fifteen billion, three hundred eighty-two million, seven hundred four thousand, two hundred thirty-eight".