20396249999 has 4 divisors (see below), whose sum is σ = 20398917240. Its totient is φ = 20393582760.

The previous prime is 20396249981. The next prime is 20396250001. The reversal of 20396249999 is 99994269302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20396249999 - 2⁸ = 20396249743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20396249299) 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, 1322117 + ... + 1337454.

It is an arithmetic number, because the mean of its divisors is an integer number (5099729310).

Almost surely, 2^20396249999 is an apocalyptic number.

20396249999 is a deficient number, since it is larger than the sum of its proper divisors (2667241).

20396249999 is an equidigital number, since it uses as much as digits as its factorization.

20396249999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2667240.

The product of its (nonzero) digits is 17006112, while the sum is 62.

The spelling of 20396249999 in words is "twenty billion, three hundred ninety-six million, two hundred forty-nine thousand, nine hundred ninety-nine".