20541006 has 32 divisors (see below), whose sum is σ = 46206720. Its totient is φ = 6763032.

The previous prime is 20540999. The next prime is 20541013. The reversal of 20541006 is 60014502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20540999) and next prime (20541013).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 20541006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2191 + ... + 6773.

It is an arithmetic number, because the mean of its divisors is an integer number (1443960).

Almost surely, 2^20541006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20541006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23103360).

20541006 is an abundant number, since it is smaller than the sum of its proper divisors (25665714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20541006 is a wasteful number, since it uses less digits than its factorization.

20541006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4677 (or 4671 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20541006 is about 4532.2186619800. The cubic root of 20541006 is about 273.8675456916.

Adding to 20541006 its reverse (60014502), we get a palindrome (80555508).

The spelling of 20541006 in words is "twenty million, five hundred forty-one thousand, six".