20381927 has 4 divisors (see below), whose sum is σ = 21454680. Its totient is φ = 19309176.

The previous prime is 20381909. The next prime is 20381939. The reversal of 20381927 is 72918302.

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 20381927 - 2¹⁰ = 20380903 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20381893 and 20381902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20381947) 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, 536348 + ... + 536385.

It is an arithmetic number, because the mean of its divisors is an integer number (5363670).

Almost surely, 2^20381927 is an apocalyptic number.

20381927 is a deficient number, since it is larger than the sum of its proper divisors (1072753).

20381927 is a wasteful number, since it uses less digits than its factorization.

20381927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072752.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 20381927 is about 4514.6347582058. The cubic root of 20381927 is about 273.1587273045.

Subtracting 20381927 from its reverse (72918302), we obtain a triangular number (52536375 = T₁₀₂₅₀).

The spelling of 20381927 in words is "twenty million, three hundred eighty-one thousand, nine hundred twenty-seven".