20008769004 has 144 divisors (see below), whose sum is σ = 61610605056. Its totient is φ = 5344704000.

The previous prime is 20008768999. The next prime is 20008769047. The reversal of 20008769004 is 40096780002.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20008769004.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 631419 + ... + 662349.

It is an arithmetic number, because the mean of its divisors is an integer number (427851424).

Almost surely, 2^20008769004 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 20008769004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30805302528).

20008769004 is an abundant number, since it is smaller than the sum of its proper divisors (41601836052).

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

20008769004 is a wasteful number, since it uses less digits than its factorization.

20008769004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31116 (or 31111 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 20008769004 in words is "twenty billion, eight million, seven hundred sixty-nine thousand, four".