20702537340203 has 2 divisors, whose sum is σ = 20702537340204. Its totient is φ = 20702537340202.

The previous prime is 20702537340169. The next prime is 20702537340241. The reversal of 20702537340203 is 30204373520702.

It is an a-pointer prime, because the next prime (20702537340241) can be obtained adding 20702537340203 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20702537340203 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20702537340283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10351268670101 + 10351268670102.

It is an arithmetic number, because the mean of its divisors is an integer number (10351268670102).

Almost surely, 2^{20702537340203} is an apocalyptic number.

20702537340203 is a deficient number, since it is larger than the sum of its proper divisors (1).

20702537340203 is an equidigital number, since it uses as much as digits as its factorization.

20702537340203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 38.

The spelling of 20702537340203 in words is "twenty trillion, seven hundred two billion, five hundred thirty-seven million, three hundred forty thousand, two hundred three".