20245432100 has 18 divisors (see below), whose sum is σ = 43932587874. Its totient is φ = 8098172800.

The previous prime is 20245432099. The next prime is 20245432133. The reversal of 20245432100 is 123454202.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 877699876 + 19367732224 = 29626^2 + 139168^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101227061 + ... + 101227260.

Almost surely, 2^20245432100 is an apocalyptic number.

20245432100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20245432100 is an abundant number, since it is smaller than the sum of its proper divisors (23687155774).

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

20245432100 is a wasteful number, since it uses less digits than its factorization.

20245432100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202454335 (or 202454328 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 20245432100 its reverse (123454202), we get a palindrome (20368886302).

The spelling of 20245432100 in words is "twenty billion, two hundred forty-five million, four hundred thirty-two thousand, one hundred".