21079437607 has 2 divisors, whose sum is σ = 21079437608. Its totient is φ = 21079437606.

The previous prime is 21079437571. The next prime is 21079437619. The reversal of 21079437607 is 70673497012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21079437607 - 2⁷ = 21079437479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21079437697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10539718803 + 10539718804.

It is an arithmetic number, because the mean of its divisors is an integer number (10539718804).

Almost surely, 2^21079437607 is an apocalyptic number.

21079437607 is a deficient number, since it is larger than the sum of its proper divisors (1).

21079437607 is an equidigital number, since it uses as much as digits as its factorization.

21079437607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 444528, while the sum is 46.

The spelling of 21079437607 in words is "twenty-one billion, seventy-nine million, four hundred thirty-seven thousand, six hundred seven".