2140636402 has 4 divisors (see below), whose sum is σ = 3210954606. Its totient is φ = 1070318200.

The previous prime is 2140636373. The next prime is 2140636403. The reversal of 2140636402 is 2046360412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2139895081 + 741321 = 46259^2 + 861^2 .

It is not an unprimeable number, because it can be changed into a prime (2140636403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535159099 + ... + 535159102.

Almost surely, 2^2140636402 is an apocalyptic number.

2140636402 is a deficient number, since it is larger than the sum of its proper divisors (1070318204).

2140636402 is a wasteful number, since it uses less digits than its factorization.

2140636402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070318203.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 2140636402 is about 46267.0120280098. The cubic root of 2140636402 is about 1288.7864720934.

Adding to 2140636402 its reverse (2046360412), we get a palindrome (4186996814).

The spelling of 2140636402 in words is "two billion, one hundred forty million, six hundred thirty-six thousand, four hundred two".