20519710780 has 48 divisors (see below), whose sum is σ = 43772883840. Its totient is φ = 8078292288.

The previous prime is 20519710769. The next prime is 20519710829. The reversal of 20519710780 is 8701791502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1680979 + ... + 1693141.

It is an arithmetic number, because the mean of its divisors is an integer number (911935080).

Almost surely, 2^20519710780 is an apocalyptic number.

20519710780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20519710780 is an abundant number, since it is smaller than the sum of its proper divisors (23253173060).

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

20519710780 is a wasteful number, since it uses less digits than its factorization.

20519710780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13498 (or 13496 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 40.

The spelling of 20519710780 in words is "twenty billion, five hundred nineteen million, seven hundred ten thousand, seven hundred eighty".