20401343 has 8 divisors (see below), whose sum is σ = 22009968. Its totient is φ = 18838144.

The previous prime is 20401333. The next prime is 20401349. The reversal of 20401343 is 34310402.

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 20401343 - 2²² = 16207039 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401349) 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, 10421 + ... + 12222.

It is an arithmetic number, because the mean of its divisors is an integer number (2751246).

Almost surely, 2^20401343 is an apocalyptic number.

20401343 is a deficient number, since it is larger than the sum of its proper divisors (1608625).

20401343 is a wasteful number, since it uses less digits than its factorization.

20401343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22713.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 20401343 is about 4516.7845864066. The cubic root of 20401343 is about 273.2454375656.

Adding to 20401343 its reverse (34310402), we get a palindrome (54711745).

The spelling of 20401343 in words is "twenty million, four hundred one thousand, three hundred forty-three".