20238549 has 16 divisors (see below), whose sum is σ = 28036800. Its totient is φ = 12970496.

The previous prime is 20238541. The next prime is 20238587. The reversal of 20238549 is 94583202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20238549 - 2³ = 20238541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20238541) 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, 30382 + ... + 31040.

It is an arithmetic number, because the mean of its divisors is an integer number (1752300).

Almost surely, 2^20238549 is an apocalyptic number.

20238549 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20238549 is a deficient number, since it is larger than the sum of its proper divisors (7798251).

20238549 is a wasteful number, since it uses less digits than its factorization.

20238549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 20238549 is about 4498.7274867456. The cubic root of 20238549 is about 272.5167018352.

The spelling of 20238549 in words is "twenty million, two hundred thirty-eight thousand, five hundred forty-nine".