21350425775 has 18 divisors (see below), whose sum is σ = 30796901640. Its totient is φ = 14640291120.

The previous prime is 21350425769. The next prime is 21350425777. The reversal of 21350425775 is 57752405312.

It is not a de Polignac number, because 21350425775 - 2¹⁴ = 21350409391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21350425777) 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 17 ways as a sum of consecutive naturals, for example, 8713235 + ... + 8715684.

It is an arithmetic number, because the mean of its divisors is an integer number (1710938980).

Almost surely, 2^21350425775 is an apocalyptic number.

21350425775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21350425775 is a deficient number, since it is larger than the sum of its proper divisors (9446475865).

21350425775 is a wasteful number, since it uses less digits than its factorization.

21350425775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17428943 (or 17428931 counting only the distinct ones).

The product of its (nonzero) digits is 294000, while the sum is 41.

The spelling of 21350425775 in words is "twenty-one billion, three hundred fifty million, four hundred twenty-five thousand, seven hundred seventy-five".