20090710509 has 16 divisors (see below), whose sum is σ = 27716805120. Its totient is φ = 12929394240.

The previous prime is 20090710487. The next prime is 20090710511. The reversal of 20090710509 is 90501709002.

It is not a de Polignac number, because 20090710509 - 2¹¹ = 20090708461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20090710509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20090710529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 483879 + ... + 523755.

It is an arithmetic number, because the mean of its divisors is an integer number (1732300320).

Almost surely, 2^20090710509 is an apocalyptic number.

20090710509 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20090710509 is a deficient number, since it is larger than the sum of its proper divisors (7626094611).

20090710509 is a wasteful number, since it uses less digits than its factorization.

20090710509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45700.

The product of its (nonzero) digits is 5670, while the sum is 33.

The spelling of 20090710509 in words is "twenty billion, ninety million, seven hundred ten thousand, five hundred nine".