20808741888 has 220 divisors, whose sum is σ = 67790941152. Its totient is φ = 6305402880.

The previous prime is 20808741853. The next prime is 20808741949. The reversal of 20808741888 is 88814780802.

It is a super-2 number, since 2×20808741888² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 900981 + ... + 923787.

Almost surely, 2^20808741888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20808741888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33895470576).

20808741888 is an abundant number, since it is smaller than the sum of its proper divisors (46982199264).

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

20808741888 is a wasteful number, since it uses less digits than its factorization.

20808741888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22850 (or 22823 counting only the distinct ones).

The product of its (nonzero) digits is 1835008, while the sum is 54.

The spelling of 20808741888 in words is "twenty billion, eight hundred eight million, seven hundred forty-one thousand, eight hundred eighty-eight".