27821620403 has 2 divisors, whose sum is σ = 27821620404. Its totient is φ = 27821620402.

The previous prime is 27821620391. The next prime is 27821620417. The reversal of 27821620403 is 30402612872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27821620403 - 2⁶ = 27821620339 is a prime.

It is not a weakly prime, because it can be changed into another prime (27821622403) 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 as a sum of consecutive naturals, namely, 13910810201 + 13910810202.

It is an arithmetic number, because the mean of its divisors is an integer number (13910810202).

Almost surely, 2^27821620403 is an apocalyptic number.

27821620403 is a deficient number, since it is larger than the sum of its proper divisors (1).

27821620403 is an equidigital number, since it uses as much as digits as its factorization.

27821620403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 27821620403 in words is "twenty-seven billion, eight hundred twenty-one million, six hundred twenty thousand, four hundred three".