21077351803 has 2 divisors, whose sum is σ = 21077351804. Its totient is φ = 21077351802.

The previous prime is 21077351767. The next prime is 21077351807. The reversal of 21077351803 is 30815377012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21077351803 - 2²⁵ = 21043797371 is a prime.

It is not a weakly prime, because it can be changed into another prime (21077351807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10538675901 + 10538675902.

It is an arithmetic number, because the mean of its divisors is an integer number (10538675902).

Almost surely, 2^21077351803 is an apocalyptic number.

21077351803 is a deficient number, since it is larger than the sum of its proper divisors (1).

21077351803 is an equidigital number, since it uses as much as digits as its factorization.

21077351803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 37.

The spelling of 21077351803 in words is "twenty-one billion, seventy-seven million, three hundred fifty-one thousand, eight hundred three".