20616240305 has 8 divisors (see below), whose sum is σ = 24748794432. Its totient is φ = 16486788208.

The previous prime is 20616240257. The next prime is 20616240313. The reversal of 20616240305 is 50304261602.

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 20616240305 - 2³² = 16321273009 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 760859 + ... + 787488.

It is an arithmetic number, because the mean of its divisors is an integer number (3093599304).

Almost surely, 2^20616240305 is an apocalyptic number.

It is an amenable number.

20616240305 is a deficient number, since it is larger than the sum of its proper divisors (4132554127).

20616240305 is a wasteful number, since it uses less digits than its factorization.

20616240305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1551015.

The product of its (nonzero) digits is 8640, while the sum is 29.

The spelling of 20616240305 in words is "twenty billion, six hundred sixteen million, two hundred forty thousand, three hundred five".