20869699 has 8 divisors (see below), whose sum is σ = 21217680. Its totient is φ = 20524416.

The previous prime is 20869687. The next prime is 20869711. The reversal of 20869699 is 99696802.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20869687) and next prime (20869711).

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 20869699 - 2⁹ = 20869187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20869609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19687 + ... + 20719.

It is an arithmetic number, because the mean of its divisors is an integer number (2652210).

Almost surely, 2^20869699 is an apocalyptic number.

20869699 is a deficient number, since it is larger than the sum of its proper divisors (347981).

20869699 is a wasteful number, since it uses less digits than its factorization.

20869699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 20869699 is about 4568.3365681613. The cubic root of 20869699 is about 275.3206133900.

The spelling of 20869699 in words is "twenty million, eight hundred sixty-nine thousand, six hundred ninety-nine".