20209211004 has 96 divisors (see below), whose sum is σ = 51489768960. Its totient is φ = 6150912768.

The previous prime is 20209211003. The next prime is 20209211039. The reversal of 20209211004 is 40011290202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20209211003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 522567 + ... + 559905.

It is an arithmetic number, because the mean of its divisors is an integer number (536351760).

Almost surely, 2^20209211004 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 20209211004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25744884480).

20209211004 is an abundant number, since it is smaller than the sum of its proper divisors (31280557956).

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

20209211004 is a wasteful number, since it uses less digits than its factorization.

20209211004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37459 (or 37457 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The spelling of 20209211004 in words is "twenty billion, two hundred nine million, two hundred eleven thousand, four".