2123430404 has 24 divisors (see below), whose sum is σ = 3747558360. Its totient is φ = 1052718336.

The previous prime is 2123430391. The next prime is 2123430409. The reversal of 2123430404 is 4040343212.

It can be written as a sum of positive squares in 4 ways, for example, as 52998400 + 2070432004 = 7280^2 + 45502^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2123430404.

It is not an unprimeable number, because it can be changed into a prime (2123430409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 610382 + ... + 613850.

It is an arithmetic number, because the mean of its divisors is an integer number (156148265).

Almost surely, 2^2123430404 is an apocalyptic number.

It is an amenable number.

2123430404 is a deficient number, since it is larger than the sum of its proper divisors (1624127956).

2123430404 is a wasteful number, since it uses less digits than its factorization.

2123430404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4727 (or 4725 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 2123430404 is about 46080.6944826139. The cubic root of 2123430404 is about 1285.3241782794.

Adding to 2123430404 its reverse (4040343212), we get a palindrome (6163773616).

The spelling of 2123430404 in words is "two billion, one hundred twenty-three million, four hundred thirty thousand, four hundred four".