2123544006 has 64 divisors (see below), whose sum is σ = 4999372800. Its totient is φ = 666271008.

The previous prime is 2123543963. The next prime is 2123544061. The reversal of 2123544006 is 6004453212.

2123544006 is a `hidden beast` number, since 21 + 235 + 4 + 400 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154491 + ... + 167673.

It is an arithmetic number, because the mean of its divisors is an integer number (78115200).

Almost surely, 2^2123544006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2123544006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2499686400).

2123544006 is an abundant number, since it is smaller than the sum of its proper divisors (2875828794).

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

2123544006 is a wasteful number, since it uses less digits than its factorization.

2123544006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13370 (or 13364 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 2123544006 is about 46081.9271081408. The cubic root of 2123544006 is about 1285.3470991771.

Adding to 2123544006 its reverse (6004453212), we get a palindrome (8127997218).

The spelling of 2123544006 in words is "two billion, one hundred twenty-three million, five hundred forty-four thousand, six".