20549590829 has 2 divisors, whose sum is σ = 20549590830. Its totient is φ = 20549590828.

The previous prime is 20549590811. The next prime is 20549590843. The reversal of 20549590829 is 92809594502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12071416900 + 8478173929 = 109870^2 + 92077^2 .

It is a cyclic number.

It is not a de Polignac number, because 20549590829 - 2²⁸ = 20281155373 is a prime.

It is a super-3 number, since 3×20549590829³ (a number of 32 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20549590129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10274795414 + 10274795415.

It is an arithmetic number, because the mean of its divisors is an integer number (10274795415).

Almost surely, 2^20549590829 is an apocalyptic number.

It is an amenable number.

20549590829 is a deficient number, since it is larger than the sum of its proper divisors (1).

20549590829 is an equidigital number, since it uses as much as digits as its factorization.

20549590829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2332800, while the sum is 53.

The spelling of 20549590829 in words is "twenty billion, five hundred forty-nine million, five hundred ninety thousand, eight hundred twenty-nine".