20012541 has 4 divisors (see below), whose sum is σ = 26683392. Its totient is φ = 13341692.

The previous prime is 20012479. The next prime is 20012543. The reversal of 20012541 is 14521002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20012541 - 2²¹ = 17915389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20012541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3335421 + ... + 3335426.

It is an arithmetic number, because the mean of its divisors is an integer number (6670848).

Almost surely, 2^20012541 is an apocalyptic number.

It is an amenable number.

20012541 is a deficient number, since it is larger than the sum of its proper divisors (6670851).

20012541 is an equidigital number, since it uses as much as digits as its factorization.

20012541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6670850.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 20012541 is about 4473.5378616929. The cubic root of 20012541 is about 271.4984856571.

Adding to 20012541 its reverse (14521002), we get a palindrome (34533543).

The spelling of 20012541 in words is "twenty million, twelve thousand, five hundred forty-one".