20630304661 has 8 divisors (see below), whose sum is σ = 22351849344. Its totient is φ = 18965204160.

The previous prime is 20630304623. The next prime is 20630304677. The reversal of 20630304661 is 16640303602.

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 20630304661 - 2²³ = 20621916053 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 (20630304061) 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, 14110285 + ... + 14111746.

It is an arithmetic number, because the mean of its divisors is an integer number (2793981168).

Almost surely, 2^20630304661 is an apocalyptic number.

It is an amenable number.

20630304661 is a deficient number, since it is larger than the sum of its proper divisors (1721544683).

20630304661 is a wasteful number, since it uses less digits than its factorization.

20630304661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28222091.

The product of its (nonzero) digits is 15552, while the sum is 31.

The spelling of 20630304661 in words is "twenty billion, six hundred thirty million, three hundred four thousand, six hundred sixty-one".