20697372743 has 2 divisors, whose sum is σ = 20697372744. Its totient is φ = 20697372742.

The previous prime is 20697372727. The next prime is 20697372821. The reversal of 20697372743 is 34727379602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20697372743 - 2⁴ = 20697372727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20697372691 and 20697372700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20697072743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10348686371 + 10348686372.

It is an arithmetic number, because the mean of its divisors is an integer number (10348686372).

Almost surely, 2^20697372743 is an apocalyptic number.

20697372743 is a deficient number, since it is larger than the sum of its proper divisors (1).

20697372743 is an equidigital number, since it uses as much as digits as its factorization.

20697372743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2667168, while the sum is 50.

The spelling of 20697372743 in words is "twenty billion, six hundred ninety-seven million, three hundred seventy-two thousand, seven hundred forty-three".