20380669 has 4 divisors (see below), whose sum is σ = 20413600. Its totient is φ = 20347740.

The previous prime is 20380643. The next prime is 20380681. The reversal of 20380669 is 96608302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20380669 - 2⁷ = 20380541 is a prime.

It is a super-2 number, since 2×20380669² = 830743337775122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20380699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15519 + ... + 16780.

It is an arithmetic number, because the mean of its divisors is an integer number (5103400).

Almost surely, 2^20380669 is an apocalyptic number.

It is an amenable number.

20380669 is a deficient number, since it is larger than the sum of its proper divisors (32931).

20380669 is an equidigital number, since it uses as much as digits as its factorization.

20380669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32930.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 20380669 is about 4514.4954313854. The cubic root of 20380669 is about 273.1531072806.

It can be divided in two parts, 20 and 380669, that added together give a square (380689 = 617²).

The spelling of 20380669 in words is "twenty million, three hundred eighty thousand, six hundred sixty-nine".