21375794343 has 16 divisors (see below), whose sum is σ = 29617920000. Its totient is φ = 13698270240.

The previous prime is 21375794299. The next prime is 21375794347. The reversal of 21375794343 is 34349757312.

It is not a de Polignac number, because 21375794343 - 2¹⁴ = 21375777959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21375794292 and 21375794301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21375794347) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 757443 + ... + 785156.

It is an arithmetic number, because the mean of its divisors is an integer number (1851120000).

Almost surely, 2^21375794343 is an apocalyptic number.

21375794343 is a deficient number, since it is larger than the sum of its proper divisors (8242125657).

21375794343 is a wasteful number, since it uses less digits than its factorization.

21375794343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542782.

The product of its digits is 1905120, while the sum is 48.

The spelling of 21375794343 in words is "twenty-one billion, three hundred seventy-five million, seven hundred ninety-four thousand, three hundred forty-three".