20654863 has 2 divisors, whose sum is σ = 20654864. Its totient is φ = 20654862.

The previous prime is 20654819. The next prime is 20654891. The reversal of 20654863 is 36845602.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20654863 - 2¹⁷ = 20523791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20654063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10327431 + 10327432.

It is an arithmetic number, because the mean of its divisors is an integer number (10327432).

Almost surely, 2^20654863 is an apocalyptic number.

20654863 is a deficient number, since it is larger than the sum of its proper divisors (1).

20654863 is an equidigital number, since it uses as much as digits as its factorization.

20654863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 20654863 is about 4544.7621499920. The cubic root of 20654863 is about 274.3726215930.

The spelling of 20654863 in words is "twenty million, six hundred fifty-four thousand, eight hundred sixty-three".