20091747436488 has 896 divisors, whose sum is σ = 75981202053120. Its totient is φ = 4826275799040.

The previous prime is 20091747436483. The next prime is 20091747436489. The reversal of 20091747436488 is 88463474719002.

20091747436488 is a `hidden beast` number, since 2 + 0 + 0 + 91 + 7 + 474 + 36 + 48 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (20091747436483) by changing a digit.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 279649306 + ... + 279721142.

It is an arithmetic number, because the mean of its divisors is an integer number (84800448720).

Almost surely, 2^{20091747436488} is an apocalyptic number.

20091747436488 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20091747436488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37990601026560).

20091747436488 is an abundant number, since it is smaller than the sum of its proper divisors (55889454616632).

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

20091747436488 is a wasteful number, since it uses less digits than its factorization.

20091747436488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71929 (or 71910 counting only the distinct ones).

The product of its (nonzero) digits is 65028096, while the sum is 63.

The spelling of 20091747436488 in words is "twenty trillion, ninety-one billion, seven hundred forty-seven million, four hundred thirty-six thousand, four hundred eighty-eight".