20203135402 has 8 divisors (see below), whose sum is σ = 30876490116. Its totient is φ = 9910972032.

The previous prime is 20203135373. The next prime is 20203135409. The reversal of 20203135402 is 20453130202.

It can be written as a sum of positive squares in 2 ways, for example, as 20198378641 + 4756761 = 142121^2 + 2181^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20203135409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95297703 + ... + 95297914.

Almost surely, 2^20203135402 is an apocalyptic number.

20203135402 is a deficient number, since it is larger than the sum of its proper divisors (10673354714).

20203135402 is a wasteful number, since it uses less digits than its factorization.

20203135402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190595672.

The product of its (nonzero) digits is 1440, while the sum is 22.

Adding to 20203135402 its reverse (20453130202), we get a palindrome (40656265604).

The spelling of 20203135402 in words is "twenty billion, two hundred three million, one hundred thirty-five thousand, four hundred two".