18838935025 has 27 divisors (see below), whose sum is σ = 23687289441. Its totient is φ = 14863069440.

The previous prime is 18838935001. The next prime is 18838935047. The reversal of 18838935025 is 52053983881.

The square root of 18838935025 is 137255.

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 692689761 + 18146245264 = 26319^2 + 134708^2 .

It is not a de Polignac number, because 18838935025 - 2¹³ = 18838926833 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 66568534 + ... + 66568816.

Almost surely, 2^18838935025 is an apocalyptic number.

18838935025 is the 137255-th square number.

18838935025 is the 68628-th centered octagonal number.

It is an amenable number.

18838935025 is a deficient number, since it is larger than the sum of its proper divisors (4848354416).

18838935025 is an frugal number, since it uses more digits than its factorization.

18838935025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770 (or 385 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 52.

The spelling of 18838935025 in words is "eighteen billion, eight hundred thirty-eight million, nine hundred thirty-five thousand, twenty-five".