20403669 has 32 divisors (see below), whose sum is σ = 32256000. Its totient is φ = 11309760.

The previous prime is 20403589. The next prime is 20403709. The reversal of 20403669 is 96630402.

It is not a de Polignac number, because 20403669 - 2⁷ = 20403541 is a prime.

It is a super-2 number, since 2×20403669² = 832619417323122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20403469) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85252 + ... + 85490.

It is an arithmetic number, because the mean of its divisors is an integer number (1008000).

Almost surely, 2^20403669 is an apocalyptic number.

It is an amenable number.

20403669 is a deficient number, since it is larger than the sum of its proper divisors (11852331).

20403669 is a wasteful number, since it uses less digits than its factorization.

20403669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 20403669 is about 4517.0420631205. The cubic root of 20403669 is about 273.2558215999.

The spelling of 20403669 in words is "twenty million, four hundred three thousand, six hundred sixty-nine".