20509337604 has 48 divisors (see below), whose sum is σ = 54712641536. Its totient is φ = 5857552800.

The previous prime is 20509337603. The next prime is 20509337609. The reversal of 20509337604 is 40673390502.

It is not an unprimeable number, because it can be changed into a prime (20509337603) 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, 178659 + ... + 270069.

Almost surely, 2^20509337604 is an apocalyptic number.

It is an amenable number.

20509337604 is an abundant number, since it is smaller than the sum of its proper divisors (34203303932).

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

20509337604 is a wasteful number, since it uses less digits than its factorization.

20509337604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94096 (or 94094 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 39.

The spelling of 20509337604 in words is "twenty billion, five hundred nine million, three hundred thirty-seven thousand, six hundred four".