20790612409 has 8 divisors (see below), whose sum is σ = 23763247040. Its totient is φ = 17818614576.

The previous prime is 20790612397. The next prime is 20790612413. The reversal of 20790612409 is 90421609702.

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

It is a de Polignac number, because none of the positive numbers 2^k-20790612409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20790612419) 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, 87054 + ... + 221719.

It is an arithmetic number, because the mean of its divisors is an integer number (2970405880).

Almost surely, 2^20790612409 is an apocalyptic number.

It is an amenable number.

20790612409 is a deficient number, since it is larger than the sum of its proper divisors (2972634631).

20790612409 is an equidigital number, since it uses as much as digits as its factorization.

20790612409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318399.

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 20790612409 in words is "twenty billion, seven hundred ninety million, six hundred twelve thousand, four hundred nine".