20059723509 has 64 divisors (see below), whose sum is σ = 31857745920. Its totient is φ = 10989665280.

The previous prime is 20059723477. The next prime is 20059723517. The reversal of 20059723509 is 90532795002.

It is not a de Polignac number, because 20059723509 - 2⁵ = 20059723477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20059723559) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 27592104 + ... + 27592830.

It is an arithmetic number, because the mean of its divisors is an integer number (497777280).

Almost surely, 2^20059723509 is an apocalyptic number.

It is an amenable number.

20059723509 is a deficient number, since it is larger than the sum of its proper divisors (11798022411).

20059723509 is a wasteful number, since it uses less digits than its factorization.

20059723509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290.

The product of its (nonzero) digits is 170100, while the sum is 42.

The spelling of 20059723509 in words is "twenty billion, fifty-nine million, seven hundred twenty-three thousand, five hundred nine".