20061553 has 2 divisors, whose sum is σ = 20061554. Its totient is φ = 20061552.

The previous prime is 20061539. The next prime is 20061583. The reversal of 20061553 is 35516002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20007729 + 53824 = 4473^2 + 232^2 .

It is a cyclic number.

It is not a de Polignac number, because 20061553 - 2¹³ = 20053361 is a prime.

It is not a weakly prime, because it can be changed into another prime (20061523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10030776 + 10030777.

It is an arithmetic number, because the mean of its divisors is an integer number (10030777).

Almost surely, 2^20061553 is an apocalyptic number.

It is an amenable number.

20061553 is a deficient number, since it is larger than the sum of its proper divisors (1).

20061553 is an equidigital number, since it uses as much as digits as its factorization.

20061553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 20061553 is about 4479.0125027734. The cubic root of 20061553 is about 271.7199440509.

Adding to 20061553 its reverse (35516002), we get a palindrome (55577555).

The spelling of 20061553 in words is "twenty million, sixty-one thousand, five hundred fifty-three".