21377079407 has 2 divisors, whose sum is σ = 21377079408. Its totient is φ = 21377079406.

The previous prime is 21377079323. The next prime is 21377079443. The reversal of 21377079407 is 70497077312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21377079407 - 2¹⁴ = 21377063023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21377079907) 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, 10688539703 + 10688539704.

It is an arithmetic number, because the mean of its divisors is an integer number (10688539704).

Almost surely, 2^21377079407 is an apocalyptic number.

21377079407 is a deficient number, since it is larger than the sum of its proper divisors (1).

21377079407 is an equidigital number, since it uses as much as digits as its factorization.

21377079407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518616, while the sum is 47.

The spelling of 21377079407 in words is "twenty-one billion, three hundred seventy-seven million, seventy-nine thousand, four hundred seven".