20700553 has 2 divisors, whose sum is σ = 20700554. Its totient is φ = 20700552.

The previous prime is 20700551. The next prime is 20700593. The reversal of 20700553 is 35500702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19784704 + 915849 = 4448^2 + 957^2 .

It is a cyclic number.

It is not a de Polignac number, because 20700553 - 2¹ = 20700551 is a prime.

Together with 20700551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20700551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10350276 + 10350277.

It is an arithmetic number, because the mean of its divisors is an integer number (10350277).

Almost surely, 2^20700553 is an apocalyptic number.

It is an amenable number.

20700553 is a deficient number, since it is larger than the sum of its proper divisors (1).

20700553 is an equidigital number, since it uses as much as digits as its factorization.

20700553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1050, while the sum is 22.

The square root of 20700553 is about 4549.7860389253. The cubic root of 20700553 is about 274.5747830704.

The spelling of 20700553 in words is "twenty million, seven hundred thousand, five hundred fifty-three".