20308189011660 has 120 divisors (see below), whose sum is σ = 69499135789776. Its totient is φ = 4923197331840.

The previous prime is 20308189011653. The next prime is 20308189011661. The reversal of 20308189011660 is 6611098180302.

20308189011660 is a `hidden beast` number, since 2 + 0 + 308 + 189 + 0 + 1 + 166 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (20308189011661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 569796687 + ... + 569832326.

Almost surely, 2^{20308189011660} is an apocalyptic number.

20308189011660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20308189011660 is an abundant number, since it is smaller than the sum of its proper divisors (49190946778116).

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

20308189011660 is a wasteful number, since it uses less digits than its factorization.

20308189011660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139629045 (or 1139629034 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 20308189011660 in words is "twenty trillion, three hundred eight billion, one hundred eighty-nine million, eleven thousand, six hundred sixty".