20867480685 has 16 divisors (see below), whose sum is σ = 37097743680. Its totient is φ = 11129322960.

The previous prime is 20867480681. The next prime is 20867480701. The reversal of 20867480685 is 58608476802.

20867480685 is a `hidden beast` number, since 2 + 0 + 86 + 7 + 480 + 6 + 85 = 666.

It is not a de Polignac number, because 20867480685 - 2² = 20867480681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20867480681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77286831 + ... + 77287100.

It is an arithmetic number, because the mean of its divisors is an integer number (2318608980).

Almost surely, 2^20867480685 is an apocalyptic number.

It is an amenable number.

20867480685 is a deficient number, since it is larger than the sum of its proper divisors (16230262995).

20867480685 is a wasteful number, since it uses less digits than its factorization.

20867480685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154573945 (or 154573939 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 54.

The spelling of 20867480685 in words is "twenty billion, eight hundred sixty-seven million, four hundred eighty thousand, six hundred eighty-five".