20407541 has 16 divisors (see below), whose sum is σ = 25989120. Its totient is φ = 15560880.

The previous prime is 20407537. The next prime is 20407547. The reversal of 20407541 is 14570402.

It is a cyclic number.

It is not a de Polignac number, because 20407541 - 2² = 20407537 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20407547) 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, 800 + ... + 6438.

It is an arithmetic number, because the mean of its divisors is an integer number (1624320).

Almost surely, 2^20407541 is an apocalyptic number.

It is an amenable number.

20407541 is a deficient number, since it is larger than the sum of its proper divisors (5581579).

20407541 is a wasteful number, since it uses less digits than its factorization.

20407541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5704.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 20407541 is about 4517.4706418526. The cubic root of 20407541 is about 273.2731057400.

Adding to 20407541 its reverse (14570402), we get a palindrome (34977943).

The spelling of 20407541 in words is "twenty million, four hundred seven thousand, five hundred forty-one".