20837207693 has 2 divisors, whose sum is σ = 20837207694. Its totient is φ = 20837207692.

The previous prime is 20837207669. The next prime is 20837207723. The reversal of 20837207693 is 39670273802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19328506729 + 1508700964 = 139027^2 + 38842^2 .

It is a cyclic number.

It is not a de Polignac number, because 20837207693 - 2²⁰ = 20836159117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20837207393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10418603846 + 10418603847.

It is an arithmetic number, because the mean of its divisors is an integer number (10418603847).

Almost surely, 2^20837207693 is an apocalyptic number.

It is an amenable number.

20837207693 is a deficient number, since it is larger than the sum of its proper divisors (1).

20837207693 is an equidigital number, since it uses as much as digits as its factorization.

20837207693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 47.

The spelling of 20837207693 in words is "twenty billion, eight hundred thirty-seven million, two hundred seven thousand, six hundred ninety-three".