20519048664 has 96 divisors (see below), whose sum is σ = 56030130000. Its totient is φ = 6783495936.

The previous prime is 20519048663. The next prime is 20519048681. The reversal of 20519048664 is 46684091502.

20519048664 is a `hidden beast` number, since 20 + 5 + 1 + 90 + 486 + 64 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20519048663) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10930894 + ... + 10932770.

Almost surely, 2^20519048664 is an apocalyptic number.

20519048664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20519048664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28015065000).

20519048664 is an abundant number, since it is smaller than the sum of its proper divisors (35511081336).

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

20519048664 is a wasteful number, since it uses less digits than its factorization.

20519048664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3057 (or 3050 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 20519048664 in words is "twenty billion, five hundred nineteen million, forty-eight thousand, six hundred sixty-four".