20627669 has 2 divisors, whose sum is σ = 20627670. Its totient is φ = 20627668.

The previous prime is 20627627. The next prime is 20627693. The reversal of 20627669 is 96672602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20593444 + 34225 = 4538^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 20627669 - 2¹² = 20623573 is a prime.

It is a super-2 number, since 2×20627669² = 851001456747122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20627569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10313834 + 10313835.

It is an arithmetic number, because the mean of its divisors is an integer number (10313835).

Almost surely, 2^20627669 is an apocalyptic number.

It is an amenable number.

20627669 is a deficient number, since it is larger than the sum of its proper divisors (1).

20627669 is an equidigital number, since it uses as much as digits as its factorization.

20627669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 20627669 is about 4541.7693688694. The cubic root of 20627669 is about 274.2521565649.

The spelling of 20627669 in words is "twenty million, six hundred twenty-seven thousand, six hundred sixty-nine".