20066992428987 has 24 divisors (see below), whose sum is σ = 33126595105760. Its totient is φ = 11466807327360.

The previous prime is 20066992428947. The next prime is 20066992429037. The reversal of 20066992428987 is 78982429966002.

20066992428987 is a `hidden beast` number, since 20 + 0 + 6 + 6 + 9 + 92 + 428 + 98 + 7 = 666.

It is not a de Polignac number, because 20066992428987 - 2¹⁸ = 20066992166843 is a prime.

It is a hoax number, since the sum of its digits (72) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20066992428947) 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 23 ways as a sum of consecutive naturals, for example, 21454839 + ... + 22370607.

Almost surely, 2^{20066992428987} is an apocalyptic number.

20066992428987 is a deficient number, since it is larger than the sum of its proper divisors (13059602676773).

20066992428987 is a wasteful number, since it uses less digits than its factorization.

20066992428987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263603 (or 1263600 counting only the distinct ones).

The product of its (nonzero) digits is 376233984, while the sum is 72.

The spelling of 20066992428987 in words is "twenty trillion, sixty-six billion, nine hundred ninety-two million, four hundred twenty-eight thousand, nine hundred eighty-seven".