20763789 has 16 divisors (see below), whose sum is σ = 29476800. Its totient is φ = 12963456.

The previous prime is 20763781. The next prime is 20763823. The reversal of 20763789 is 98736702.

It is not a de Polignac number, because 20763789 - 2³ = 20763781 is a prime.

It is a super-2 number, since 2×20763789² = 862269867273042, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20763789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20763781) 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, 3027 + ... + 7119.

It is an arithmetic number, because the mean of its divisors is an integer number (1842300).

Almost surely, 2^20763789 is an apocalyptic number.

It is an amenable number.

20763789 is a deficient number, since it is larger than the sum of its proper divisors (8713011).

20763789 is a wasteful number, since it uses less digits than its factorization.

20763789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4204.

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 20763789 is about 4556.7300775885. The cubic root of 20763789 is about 274.8540889866.

The spelling of 20763789 in words is "twenty million, seven hundred sixty-three thousand, seven hundred eighty-nine".