20381952 has 36 divisors (see below), whose sum is σ = 54247760. Its totient is φ = 6793728.

The previous prime is 20381947. The next prime is 20381971. The reversal of 20381952 is 25918302.

It is a happy number.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12502 + ... + 14037.

Almost surely, 2^20381952 is an apocalyptic number.

It is an amenable number.

20381952 is an abundant number, since it is smaller than the sum of its proper divisors (33865808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20381952 is an equidigital number, since it uses as much as digits as its factorization.

20381952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26558 (or 26544 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 20381952 is about 4514.6375269782. The cubic root of 20381952 is about 273.1588389878.

The spelling of 20381952 in words is "twenty million, three hundred eighty-one thousand, nine hundred fifty-two".