20402303001 has 16 divisors (see below), whose sum is σ = 27517520448. Its totient is φ = 13445120000.

The previous prime is 20402302979. The next prime is 20402303011. The reversal of 20402303001 is 10030320402.

20402303001 is a nontrivial binomial coefficient, being equal to C(202002, 2).

It is a cyclic number.

It is not a de Polignac number, because 20402303001 - 2⁶ = 20402302937 is a prime.

It is a super-2 number, since 2×20402303001² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20402303011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1 + ... + 202001.

It is an arithmetic number, because the mean of its divisors is an integer number (1719845028).

Almost surely, 2^20402303001 is an apocalyptic number.

20402303001 is the 202001-st triangular number and also the 101001-st hexagonal number.

It is an amenable number.

20402303001 is a deficient number, since it is larger than the sum of its proper divisors (7115217447).

20402303001 is a wasteful number, since it uses less digits than its factorization.

20402303001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202392.

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 20402303001 its reverse (10030320402), we get a palindrome (30432623403).

It can be divided in two parts, 2040230 and 3001, that added together give a triangular number (2043231 = T₂₀₂₁).

The spelling of 20402303001 in words is "twenty billion, four hundred two million, three hundred three thousand, one".