20045379 has 16 divisors (see below), whose sum is σ = 27578880. Its totient is φ = 12941280.

The previous prime is 20045371. The next prime is 20045387. The reversal of 20045379 is 97354002.

It is an interprime number because it is at equal distance from previous prime (20045371) and next prime (20045387).

It is not a de Polignac number, because 20045379 - 2³ = 20045371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20045371) 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, 46294 + ... + 46724.

It is an arithmetic number, because the mean of its divisors is an integer number (1723680).

Almost surely, 2^20045379 is an apocalyptic number.

20045379 is a deficient number, since it is larger than the sum of its proper divisors (7533501).

20045379 is a wasteful number, since it uses less digits than its factorization.

20045379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 20045379 is about 4477.2066068030. The cubic root of 20045379 is about 271.6469025146.

The spelling of 20045379 in words is "twenty million, forty-five thousand, three hundred seventy-nine".