20019769 has 16 divisors (see below), whose sum is σ = 25767936. Its totient is φ = 15094800.

The previous prime is 20019763. The next prime is 20019781. The reversal of 20019769 is 96791002.

It is not a de Polignac number, because 20019769 - 2⁷ = 20019641 is a prime.

It is a super-2 number, since 2×20019769² = 801582301626722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20019763) 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 15 ways as a sum of consecutive naturals, for example, 1807 + ... + 6580.

It is an arithmetic number, because the mean of its divisors is an integer number (1610496).

Almost surely, 2^20019769 is an apocalyptic number.

It is an amenable number.

20019769 is a deficient number, since it is larger than the sum of its proper divisors (5748167).

20019769 is a wasteful number, since it uses less digits than its factorization.

20019769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8436.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 20019769 is about 4474.3456504834. The cubic root of 20019769 is about 271.5311677446.

The spelling of 20019769 in words is "twenty million, nineteen thousand, seven hundred sixty-nine".