20514541 has 2 divisors, whose sum is σ = 20514542. Its totient is φ = 20514540.

The previous prime is 20514523. The next prime is 20514553. The reversal of 20514541 is 14541502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18096516 + 2418025 = 4254^2 + 1555^2 .

It is a cyclic number.

It is not a de Polignac number, because 20514541 - 2¹³ = 20506349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20514521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10257270 + 10257271.

It is an arithmetic number, because the mean of its divisors is an integer number (10257271).

Almost surely, 2^20514541 is an apocalyptic number.

It is an amenable number.

20514541 is a deficient number, since it is larger than the sum of its proper divisors (1).

20514541 is an equidigital number, since it uses as much as digits as its factorization.

20514541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 20514541 is about 4529.2980692377. The cubic root of 20514541 is about 273.7498783038.

The spelling of 20514541 in words is "twenty million, five hundred fourteen thousand, five hundred forty-one".