2144020402 has 16 divisors (see below), whose sum is σ = 3344183640. Its totient is φ = 1029676032.

The previous prime is 2144020397. The next prime is 2144020423. The reversal of 2144020402 is 2040204412.

It can be written as a sum of positive squares in 4 ways, for example, as 1596881521 + 547138881 = 39961^2 + 23391^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2144020402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84573 + ... + 106960.

Almost surely, 2^2144020402 is an apocalyptic number.

2144020402 is a deficient number, since it is larger than the sum of its proper divisors (1200163238).

2144020402 is a wasteful number, since it uses less digits than its factorization.

2144020402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191757.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 2144020402 is about 46303.5679186820. The cubic root of 2144020402 is about 1289.4652355502.

Adding to 2144020402 its reverse (2040204412), we get a palindrome (4184224814).

The spelling of 2144020402 in words is "two billion, one hundred forty-four million, twenty thousand, four hundred two".