20231405 has 8 divisors (see below), whose sum is σ = 24324192. Its totient is φ = 16154128.

The previous prime is 20231401. The next prime is 20231417. The reversal of 20231405 is 50413202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20231405 - 2² = 20231401 is a prime.

It is a super-3 number, since 3×20231405³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20231401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 779 + ... + 6408.

It is an arithmetic number, because the mean of its divisors is an integer number (3040524).

Almost surely, 2^20231405 is an apocalyptic number.

It is an amenable number.

20231405 is a deficient number, since it is larger than the sum of its proper divisors (4092787).

20231405 is an equidigital number, since it uses as much as digits as its factorization.

20231405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7755.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20231405 is about 4497.9334143582. The cubic root of 20231405 is about 272.4846328623.

Adding to 20231405 its reverse (50413202), we get a palindrome (70644607).

The spelling of 20231405 in words is "twenty million, two hundred thirty-one thousand, four hundred five".