20869446 has 16 divisors (see below), whose sum is σ = 44949744. Its totient is φ = 6421344.

The previous prime is 20869423. The next prime is 20869447. The reversal of 20869446 is 64496802.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20869447) 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, 133701 + ... + 133856.

It is an arithmetic number, because the mean of its divisors is an integer number (2809359).

Almost surely, 2^20869446 is an apocalyptic number.

20869446 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20869446 is an abundant number, since it is smaller than the sum of its proper divisors (24080298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20869446 is a wasteful number, since it uses less digits than its factorization.

20869446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267575.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 20869446 is about 4568.3088774732. The cubic root of 20869446 is about 275.3195008297.

The spelling of 20869446 in words is "twenty million, eight hundred sixty-nine thousand, four hundred forty-six".