19940669 has 8 divisors (see below), whose sum is σ = 23405568. Its totient is φ = 16629840.

The previous prime is 19940663. The next prime is 19940693. The reversal of 19940669 is 96604991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19940669 - 2¹² = 19936573 is a prime.

It is a super-2 number, since 2×19940669² = 795260560335122, 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 (19940663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38237 + ... + 38754.

It is an arithmetic number, because the mean of its divisors is an integer number (2925696).

Almost surely, 2^19940669 is an apocalyptic number.

It is an amenable number.

19940669 is a deficient number, since it is larger than the sum of its proper divisors (3464899).

19940669 is an equidigital number, since it uses as much as digits as its factorization.

19940669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77035.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 19940669 is about 4465.4976206466. The cubic root of 19940669 is about 271.1730806128.

The spelling of 19940669 in words is "nineteen million, nine hundred forty thousand, six hundred sixty-nine".