20641802371 has 2 divisors, whose sum is σ = 20641802372. Its totient is φ = 20641802370.

The previous prime is 20641802353. The next prime is 20641802393. The reversal of 20641802371 is 17320814602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20641802371 - 2⁷ = 20641802243 is a prime.

It is not a weakly prime, because it can be changed into another prime (20641802171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10320901185 + 10320901186.

It is an arithmetic number, because the mean of its divisors is an integer number (10320901186).

Almost surely, 2^20641802371 is an apocalyptic number.

20641802371 is a deficient number, since it is larger than the sum of its proper divisors (1).

20641802371 is an equidigital number, since it uses as much as digits as its factorization.

20641802371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 34.

The spelling of 20641802371 in words is "twenty billion, six hundred forty-one million, eight hundred two thousand, three hundred seventy-one".