21476137699 has 2 divisors, whose sum is σ = 21476137700. Its totient is φ = 21476137698.

The previous prime is 21476137687. The next prime is 21476137721. The reversal of 21476137699 is 99673167412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21476137699 - 2¹⁷ = 21476006627 is a prime.

It is a super-2 number, since 2×21476137699² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21476137999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10738068849 + 10738068850.

It is an arithmetic number, because the mean of its divisors is an integer number (10738068850).

Almost surely, 2^21476137699 is an apocalyptic number.

21476137699 is a deficient number, since it is larger than the sum of its proper divisors (1).

21476137699 is an equidigital number, since it uses as much as digits as its factorization.

21476137699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3429216, while the sum is 55.

The spelling of 21476137699 in words is "twenty-one billion, four hundred seventy-six million, one hundred thirty-seven thousand, six hundred ninety-nine".