20178770704 has 45 divisors (see below), whose sum is σ = 41551326687. Its totient is φ = 9491346432.

The previous prime is 20178770671. The next prime is 20178770783. The reversal of 20178770704 is 40707787102.

The square root of 20178770704 is 142052.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 8952944400 + 11225826304 = 94620^2 + 105952^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9658492 + ... + 9660580.

Almost surely, 2^20178770704 is an apocalyptic number.

20178770704 is the 142052-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20178770704

20178770704 is an abundant number, since it is smaller than the sum of its proper divisors (21372555983).

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

20178770704 is an frugal number, since it uses more digits than its factorization.

20178770704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4220 (or 2108 counting only the distinct ones).

The product of its (nonzero) digits is 153664, while the sum is 43.

The spelling of 20178770704 in words is "twenty billion, one hundred seventy-eight million, seven hundred seventy thousand, seven hundred four".