20389527 has 12 divisors (see below), whose sum is σ = 31001880. Its totient is φ = 12877488.

The previous prime is 20389517. The next prime is 20389541. The reversal of 20389527 is 72598302.

It is a happy number.

It is not a de Polignac number, because 20389527 - 2⁶ = 20389463 is a prime.

It is a super-2 number, since 2×20389527² = 831465622567458, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20389491 and 20389500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20389517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59448 + ... + 59789.

It is an arithmetic number, because the mean of its divisors is an integer number (2583490).

Almost surely, 2^20389527 is an apocalyptic number.

20389527 is a deficient number, since it is larger than the sum of its proper divisors (10612353).

20389527 is a wasteful number, since it uses less digits than its factorization.

20389527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119262 (or 119259 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 20389527 is about 4515.4763868279. The cubic root of 20389527 is about 273.1926748363.

The spelling of 20389527 in words is "twenty million, three hundred eighty-nine thousand, five hundred twenty-seven".