20601541 has 6 divisors (see below), whose sum is σ = 20871942. Its totient is φ = 20334600.

The previous prime is 20601533. The next prime is 20601547. The reversal of 20601541 is 14510602.

It can be written as a sum of positive squares in only one way, i.e., 14984641 + 5616900 = 3871^2 + 2370^2 .

It is not a de Polignac number, because 20601541 - 2³ = 20601533 is a prime.

It is a super-3 number, since 3×20601541³ (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 (20601547) 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 in 5 ways as a sum of consecutive naturals, for example, 4591 + ... + 7891.

It is an arithmetic number, because the mean of its divisors is an integer number (3478657).

Almost surely, 2^20601541 is an apocalyptic number.

It is an amenable number.

20601541 is a deficient number, since it is larger than the sum of its proper divisors (270401).

20601541 is an frugal number, since it uses more digits than its factorization.

20601541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3459 (or 3380 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 20601541 is about 4538.8920454225. The cubic root of 20601541 is about 274.1363139728.

The spelling of 20601541 in words is "twenty million, six hundred one thousand, five hundred forty-one".