20690466143 has 2 divisors, whose sum is σ = 20690466144. Its totient is φ = 20690466142.

The previous prime is 20690466067. The next prime is 20690466211. The reversal of 20690466143 is 34166409602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20690466143 - 2¹⁰ = 20690465119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20690466143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20690466343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10345233071 + 10345233072.

It is an arithmetic number, because the mean of its divisors is an integer number (10345233072).

Almost surely, 2^20690466143 is an apocalyptic number.

20690466143 is a deficient number, since it is larger than the sum of its proper divisors (1).

20690466143 is an equidigital number, since it uses as much as digits as its factorization.

20690466143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 41.

The spelling of 20690466143 in words is "twenty billion, six hundred ninety million, four hundred sixty-six thousand, one hundred forty-three".