20603344536 has 48 divisors (see below), whose sum is σ = 55833446760. Its totient is φ = 6863754240.

The previous prime is 20603344529. The next prime is 20603344609. The reversal of 20603344536 is 63544330602.

20603344536 is a `hidden beast` number, since 2 + 0 + 603 + 3 + 4 + 45 + 3 + 6 = 666.

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 20603344536.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41016 + ... + 207096.

Almost surely, 2^20603344536 is an apocalyptic number.

It is an amenable number.

20603344536 is an abundant number, since it is smaller than the sum of its proper divisors (35230102224).

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

20603344536 is a wasteful number, since it uses less digits than its factorization.

20603344536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167816 (or 167809 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 36.

The spelling of 20603344536 in words is "twenty billion, six hundred three million, three hundred forty-four thousand, five hundred thirty-six".