20546634403 has 2 divisors, whose sum is σ = 20546634404. Its totient is φ = 20546634402.

The previous prime is 20546634389. The next prime is 20546634443. The reversal of 20546634403 is 30443664502.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20546634403 - 2¹³ = 20546626211 is a prime.

It is not a weakly prime, because it can be changed into another prime (20546634443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10273317201 + 10273317202.

It is an arithmetic number, because the mean of its divisors is an integer number (10273317202).

Almost surely, 2^20546634403 is an apocalyptic number.

20546634403 is a deficient number, since it is larger than the sum of its proper divisors (1).

20546634403 is an equidigital number, since it uses as much as digits as its factorization.

20546634403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 37.

The spelling of 20546634403 in words is "twenty billion, five hundred forty-six million, six hundred thirty-four thousand, four hundred three".