20485379 has 4 divisors (see below), whose sum is σ = 20508360. Its totient is φ = 20462400.

The previous prime is 20485369. The next prime is 20485427. The reversal of 20485379 is 97358402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20485379 - 2¹² = 20481283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20485369) 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, 10097 + ... + 11954.

It is an arithmetic number, because the mean of its divisors is an integer number (5127090).

Almost surely, 2^20485379 is an apocalyptic number.

20485379 is a deficient number, since it is larger than the sum of its proper divisors (22981).

20485379 is an equidigital number, since it uses as much as digits as its factorization.

20485379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22980.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 20485379 is about 4526.0776617288. The cubic root of 20485379 is about 273.6201023940.

The spelling of 20485379 in words is "twenty million, four hundred eighty-five thousand, three hundred seventy-nine".