20106681516 has 30 divisors (see below), whose sum is σ = 52562838020. Its totient is φ = 6702227064.

The previous prime is 20106681509. The next prime is 20106681593. The reversal of 20106681516 is 61518660102.

20106681516 is a `hidden beast` number, since 2 + 0 + 1 + 0 + 66 + 81 + 516 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 31028506 + ... + 31029153.

Almost surely, 2^20106681516 is an apocalyptic number.

It is an amenable number.

20106681516 is an abundant number, since it is smaller than the sum of its proper divisors (32456156504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20106681516 is a wasteful number, since it uses less digits than its factorization.

20106681516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62057675 (or 62057664 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 20106681516 in words is "twenty billion, one hundred six million, six hundred eighty-one thousand, five hundred sixteen".