20541205104 has 80 divisors (see below), whose sum is σ = 60747302400. Its totient is φ = 5859060480.

The previous prime is 20541205103. The next prime is 20541205109. The reversal of 20541205104 is 40150214502.

It is a super-2 number, since 2×20541205104² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20541205103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150234 + ... + 252294.

It is an arithmetic number, because the mean of its divisors is an integer number (759341280).

Almost surely, 2^20541205104 is an apocalyptic number.

20541205104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20541205104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30373651200).

20541205104 is an abundant number, since it is smaller than the sum of its proper divisors (40206097296).

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

20541205104 is a wasteful number, since it uses less digits than its factorization.

20541205104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102678 (or 102672 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 20541205104 its reverse (40150214502), we get a palindrome (60691419606).

The spelling of 20541205104 in words is "twenty billion, five hundred forty-one million, two hundred five thousand, one hundred four".