20446769 has 12 divisors (see below), whose sum is σ = 24606900. Its totient is φ = 16920288.

The previous prime is 20446729. The next prime is 20446799. The reversal of 20446769 is 96764402.

It can be written as a sum of positive squares in 2 ways, for example, as 8196769 + 12250000 = 2863^2 + 3500^2 .

It is not a de Polignac number, because 20446769 - 2⁸ = 20446513 is a prime.

It is a super-2 number, since 2×20446769² = 836140725078722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20446709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5774 + ... + 8615.

It is an arithmetic number, because the mean of its divisors is an integer number (2050575).

Almost surely, 2^20446769 is an apocalyptic number.

20446769 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20446769 is a deficient number, since it is larger than the sum of its proper divisors (4160131).

20446769 is a wasteful number, since it uses less digits than its factorization.

20446769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14432 (or 14425 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 20446769 is about 4521.8103675409. The cubic root of 20446769 is about 273.4480916431.

The spelling of 20446769 in words is "twenty million, four hundred forty-six thousand, seven hundred sixty-nine".