20415499999 has 8 divisors (see below), whose sum is σ = 20438491392. Its totient is φ = 20392525440.

The previous prime is 20415499987. The next prime is 20415500003. The reversal of 20415499999 is 99999451402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20415499999 - 2²³ = 20407111391 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 (20415499969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5556427 + ... + 5560099.

It is an arithmetic number, because the mean of its divisors is an integer number (2554811424).

Almost surely, 2^20415499999 is an apocalyptic number.

20415499999 is a deficient number, since it is larger than the sum of its proper divisors (22991393).

20415499999 is a wasteful number, since it uses less digits than its factorization.

20415499999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8417.

The product of its (nonzero) digits is 9447840, while the sum is 61.

The spelling of 20415499999 in words is "twenty billion, four hundred fifteen million, four hundred ninety-nine thousand, nine hundred ninety-nine".