20541081 has 24 divisors (see below), whose sum is σ = 30566592. Its totient is φ = 12258400.

The previous prime is 20541067. The next prime is 20541091. The reversal of 20541081 is 18014502.

It is not a de Polignac number, because 20541081 - 2⁷ = 20540953 is a prime.

It is a super-2 number, since 2×20541081² = 843872017297122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20541091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25375 + ... + 26171.

It is an arithmetic number, because the mean of its divisors is an integer number (1273608).

Almost surely, 2^20541081 is an apocalyptic number.

It is an amenable number.

20541081 is a deficient number, since it is larger than the sum of its proper divisors (10025511).

20541081 is a wasteful number, since it uses less digits than its factorization.

20541081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893 (or 882 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 20541081 is about 4532.2269360658. The cubic root of 20541081 is about 273.8678790093.

Adding to 20541081 its reverse (18014502), we get a palindrome (38555583).

The spelling of 20541081 in words is "twenty million, five hundred forty-one thousand, eighty-one".