20403213032 has 8 divisors (see below), whose sum is σ = 38256024450. Its totient is φ = 10201606512.

The previous prime is 20403213031. The next prime is 20403213049. The reversal of 20403213032 is 23031230402.

It can be written as a sum of positive squares in only one way, i.e., 15058725796 + 5344487236 = 122714^2 + 73106^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20403213032² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20403212995 and 20403213013.

It is not an unprimeable number, because it can be changed into a prime (20403213031) 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 as a sum of consecutive naturals, namely, 1275200807 + ... + 1275200822.

Almost surely, 2^20403213032 is an apocalyptic number.

It is an amenable number.

20403213032 is a deficient number, since it is larger than the sum of its proper divisors (17852811418).

20403213032 is a wasteful number, since it uses less digits than its factorization.

20403213032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550401635 (or 2550401631 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 20403213032 its reverse (23031230402), we get a palindrome (43434443434).

The spelling of 20403213032 in words is "twenty billion, four hundred three million, two hundred thirteen thousand, thirty-two".