20168241984 has 84 divisors (see below), whose sum is σ = 63063973440. Its totient is φ = 6111586560.

The previous prime is 20168241971. The next prime is 20168242013. The reversal of 20168241984 is 48914286102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1585224 + ... + 1597895.

Almost surely, 2^20168241984 is an apocalyptic number.

20168241984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20168241984 is an abundant number, since it is smaller than the sum of its proper divisors (42895731456).

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

20168241984 is a wasteful number, since it uses less digits than its factorization.

20168241984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3183148 (or 3183135 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 20168241984 in words is "twenty billion, one hundred sixty-eight million, two hundred forty-one thousand, nine hundred eighty-four".