20679847461 has 48 divisors (see below), whose sum is σ = 37045008000. Its totient is φ = 10824727680.

The previous prime is 20679847457. The next prime is 20679847549. The reversal of 20679847461 is 16474897602.

20679847461 is a `hidden beast` number, since 20 + 6 + 7 + 98 + 474 + 61 = 666.

It is not a de Polignac number, because 20679847461 - 2² = 20679847457 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20679847398 and 20679847407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20679847411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10915 + ... + 203663.

It is an arithmetic number, because the mean of its divisors is an integer number (771771000).

Almost surely, 2^20679847461 is an apocalyptic number.

20679847461 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20679847461 is a deficient number, since it is larger than the sum of its proper divisors (16365160539).

20679847461 is a wasteful number, since it uses less digits than its factorization.

20679847461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192906 (or 192903 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 20679847461 in words is "twenty billion, six hundred seventy-nine million, eight hundred forty-seven thousand, four hundred sixty-one".