21352682403 has 24 divisors (see below), whose sum is σ = 34445484528. Its totient is φ = 13140110304.

The previous prime is 21352682399. The next prime is 21352682411. The reversal of 21352682403 is 30428625312.

21352682403 is a `hidden beast` number, since 2 + 1 + 352 + 68 + 240 + 3 = 666.

It is not a de Polignac number, because 21352682403 - 2² = 21352682399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21352682423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3376500 + ... + 3382817.

It is an arithmetic number, because the mean of its divisors is an integer number (1435228522).

Almost surely, 2^21352682403 is an apocalyptic number.

21352682403 is a deficient number, since it is larger than the sum of its proper divisors (13092802125).

21352682403 is an equidigital number, since it uses as much as digits as its factorization.

21352682403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6759345 (or 6759333 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 21352682403 in words is "twenty-one billion, three hundred fifty-two million, six hundred eighty-two thousand, four hundred three".