20144561784 has 32 divisors (see below), whose sum is σ = 50364942720. Its totient is φ = 6714382176.

The previous prime is 20144561779. The next prime is 20144561797. The reversal of 20144561784 is 48716544102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 558687 + ... + 593649.

It is an arithmetic number, because the mean of its divisors is an integer number (1573904460).

Almost surely, 2^20144561784 is an apocalyptic number.

20144561784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20144561784 is an abundant number, since it is smaller than the sum of its proper divisors (30220380936).

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

20144561784 is a wasteful number, since it uses less digits than its factorization.

20144561784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58979 (or 58975 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The spelling of 20144561784 in words is "twenty billion, one hundred forty-four million, five hundred sixty-one thousand, seven hundred eighty-four".