20603669 has 2 divisors, whose sum is σ = 20603670. Its totient is φ = 20603668.

The previous prime is 20603647. The next prime is 20603701. The reversal of 20603669 is 96630602.

It is an a-pointer prime, because the next prime (20603701) can be obtained adding 20603669 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15697444 + 4906225 = 3962^2 + 2215^2 .

It is a cyclic number.

It is not a de Polignac number, because 20603669 - 2²⁴ = 3826453 is a prime.

It is a super-2 number, since 2×20603669² = 849022352523122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20603969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10301834 + 10301835.

It is an arithmetic number, because the mean of its divisors is an integer number (10301835).

Almost surely, 2^20603669 is an apocalyptic number.

It is an amenable number.

20603669 is a deficient number, since it is larger than the sum of its proper divisors (1).

20603669 is an equidigital number, since it uses as much as digits as its factorization.

20603669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 20603669 is about 4539.1264578110. The cubic root of 20603669 is about 274.1457524576.

The spelling of 20603669 in words is "twenty million, six hundred three thousand, six hundred sixty-nine".