20380895 has 16 divisors (see below), whose sum is σ = 25740288. Its totient is φ = 15471360.

The previous prime is 20380889. The next prime is 20380897. The reversal of 20380895 is 59808302.

It is not a de Polignac number, because 20380895 - 2⁶ = 20380831 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 (20380897) 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, 6242 + ... + 8928.

It is an arithmetic number, because the mean of its divisors is an integer number (1608768).

Almost surely, 2^20380895 is an apocalyptic number.

20380895 is a deficient number, since it is larger than the sum of its proper divisors (5359393).

20380895 is a wasteful number, since it uses less digits than its factorization.

20380895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 20380895 is about 4514.5204617988. The cubic root of 20380895 is about 273.1541169363.

The spelling of 20380895 in words is "twenty million, three hundred eighty thousand, eight hundred ninety-five".