20393895544 has 32 divisors (see below), whose sum is σ = 41806148400. Its totient is φ = 9249649920.

The previous prime is 20393895541. The next prime is 20393895559. The reversal of 20393895544 is 44559839302.

It is a junction number, because it is equal to n+sod(n) for n = 20393895491 and 20393895500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20393895541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213339 + ... + 293770.

Almost surely, 2^20393895544 is an apocalyptic number.

It is an amenable number.

20393895544 is an abundant number, since it is smaller than the sum of its proper divisors (21412252856).

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

20393895544 is a wasteful number, since it uses less digits than its factorization.

20393895544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507583 (or 507579 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 52.

The spelling of 20393895544 in words is "twenty billion, three hundred ninety-three million, eight hundred ninety-five thousand, five hundred forty-four".