20381948 has 12 divisors (see below), whose sum is σ = 35734272. Its totient is φ = 10172160.

The previous prime is 20381947. The next prime is 20381971. The reversal of 20381948 is 84918302.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20381941) 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, 2108 + ... + 6723.

It is an arithmetic number, because the mean of its divisors is an integer number (2977856).

Almost surely, 2^20381948 is an apocalyptic number.

It is an amenable number.

20381948 is a deficient number, since it is larger than the sum of its proper divisors (15352324).

20381948 is a wasteful number, since it uses less digits than its factorization.

20381948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9412 (or 9410 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 20381948 is about 4514.6370839747. The cubic root of 20381948 is about 273.1588211185.

The spelling of 20381948 in words is "twenty million, three hundred eighty-one thousand, nine hundred forty-eight".