20605848984 has 64 divisors (see below), whose sum is σ = 65415398400. Its totient is φ = 5887384992.

The previous prime is 20605848929. The next prime is 20605848997. The reversal of 20605848984 is 48984850602.

20605848984 is a `hidden beast` number, since 20 + 60 + 5 + 8 + 489 + 84 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 20605848984.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6812592 + ... + 6815615.

It is an arithmetic number, because the mean of its divisors is an integer number (1022115600).

Almost surely, 2^20605848984 is an apocalyptic number.

20605848984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20605848984 is an abundant number, since it is smaller than the sum of its proper divisors (44809549416).

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

20605848984 is a wasteful number, since it uses less digits than its factorization.

20605848984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13628229 (or 13628219 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 54.

The spelling of 20605848984 in words is "twenty billion, six hundred five million, eight hundred forty-eight thousand, nine hundred eighty-four".