20403213100 has 18 divisors (see below), whose sum is σ = 44274972644. Its totient is φ = 8161285200.

The previous prime is 20403213097. The next prime is 20403213109. The reversal of 20403213100 is 131230402.

It is a happy number.

It is a super-2 number, since 2×20403213100² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20403213109) 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 5 ways as a sum of consecutive naturals, for example, 102015966 + ... + 102016165.

Almost surely, 2^20403213100 is an apocalyptic number.

20403213100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20403213100 is an abundant number, since it is smaller than the sum of its proper divisors (23871759544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20403213100 is a wasteful number, since it uses less digits than its factorization.

20403213100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204032145 (or 204032138 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20403213100 its reverse (131230402), we get a palindrome (20534443502).

The spelling of 20403213100 in words is "twenty billion, four hundred three million, two hundred thirteen thousand, one hundred".