20238471 has 32 divisors (see below), whose sum is σ = 33143040. Its totient is φ = 12103200.

The previous prime is 20238469. The next prime is 20238473. The reversal of 20238471 is 17483202.

It is an interprime number because it is at equal distance from previous prime (20238469) and next prime (20238473).

It is not a de Polignac number, because 20238471 - 2¹ = 20238469 is a prime.

It is a super-3 number, since 3×20238471³ (a number of 23 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20238473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24241 + ... + 25061.

It is an arithmetic number, because the mean of its divisors is an integer number (1035720).

Almost surely, 2^20238471 is an apocalyptic number.

20238471 is a deficient number, since it is larger than the sum of its proper divisors (12904569).

20238471 is a wasteful number, since it uses less digits than its factorization.

20238471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924 (or 918 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 20238471 is about 4498.7188176191. The cubic root of 20238471 is about 272.5163517388.

The spelling of 20238471 in words is "twenty million, two hundred thirty-eight thousand, four hundred seventy-one".