20379049 has 4 divisors (see below), whose sum is σ = 20388564. Its totient is φ = 20369536.

The previous prime is 20379041. The next prime is 20379061. The reversal of 20379049 is 94097302.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 19184400 + 1194649 = 4380^2 + 1093^2 .

It is a cyclic number.

It is not a de Polignac number, because 20379049 - 2³ = 20379041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20379041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129 + ... + 6385.

It is an arithmetic number, because the mean of its divisors is an integer number (5097141).

Almost surely, 2^20379049 is an apocalyptic number.

It is an amenable number.

20379049 is a deficient number, since it is larger than the sum of its proper divisors (9515).

20379049 is an equidigital number, since it uses as much as digits as its factorization.

20379049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9514.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 20379049 is about 4514.3160057754. The cubic root of 20379049 is about 273.1458697073.

The spelling of 20379049 in words is "twenty million, three hundred seventy-nine thousand, forty-nine".