20145718730 has 16 divisors (see below), whose sum is σ = 36275401800. Its totient is φ = 8055374592.

The previous prime is 20145718727. The next prime is 20145718757. The reversal of 20145718730 is 3781754102.

It can be written as a sum of positive squares in 4 ways, for example, as 16182638521 + 3963080209 = 127211^2 + 62953^2 .

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, 334955 + ... + 390494.

Almost surely, 2^20145718730 is an apocalyptic number.

20145718730 is a deficient number, since it is larger than the sum of its proper divisors (16129683070).

20145718730 is a wasteful number, since it uses less digits than its factorization.

20145718730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728233.

The product of its (nonzero) digits is 47040, while the sum is 38.

The spelling of 20145718730 in words is "twenty billion, one hundred forty-five million, seven hundred eighteen thousand, seven hundred thirty".