20379789 has 16 divisors (see below), whose sum is σ = 30352000. Its totient is φ = 13514688.

The previous prime is 20379781. The next prime is 20379809. The reversal of 20379789 is 98797302.

It is not a de Polignac number, because 20379789 - 2³ = 20379781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20379781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3477 + ... + 7269.

It is an arithmetic number, because the mean of its divisors is an integer number (1897000).

Almost surely, 2^20379789 is an apocalyptic number.

It is an amenable number.

20379789 is a deficient number, since it is larger than the sum of its proper divisors (9972211).

20379789 is a wasteful number, since it uses less digits than its factorization.

20379789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4001 (or 3995 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 20379789 is about 4514.3979665067. The cubic root of 20379789 is about 273.1491758069.

The spelling of 20379789 in words is "twenty million, three hundred seventy-nine thousand, seven hundred eighty-nine".