20371669 has 2 divisors, whose sum is σ = 20371670. Its totient is φ = 20371668.

The previous prime is 20371597. The next prime is 20371691. The reversal of 20371669 is 96617302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15800625 + 4571044 = 3975^2 + 2138^2 .

It is a cyclic number.

It is not a de Polignac number, because 20371669 - 2¹³ = 20363477 is a prime.

It is a super-2 number, since 2×20371669² = 830009795691122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20371699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10185834 + 10185835.

It is an arithmetic number, because the mean of its divisors is an integer number (10185835).

Almost surely, 2^20371669 is an apocalyptic number.

It is an amenable number.

20371669 is a deficient number, since it is larger than the sum of its proper divisors (1).

20371669 is an equidigital number, since it uses as much as digits as its factorization.

20371669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 20371669 is about 4513.4985321810. The cubic root of 20371669 is about 273.1128936853.

The spelling of 20371669 in words is "twenty million, three hundred seventy-one thousand, six hundred sixty-nine".