18825951394 has 16 divisors (see below), whose sum is σ = 28764750456. Its totient is φ = 9238377600.

The previous prime is 18825951367. The next prime is 18825951413. The reversal of 18825951394 is 49315952881.

It can be written as a sum of positive squares in 4 ways, for example, as 18579053025 + 246898369 = 136305^2 + 15713^2 .

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, 113077 + ... + 224584.

Almost surely, 2^18825951394 is an apocalyptic number.

18825951394 is a deficient number, since it is larger than the sum of its proper divisors (9938799062).

18825951394 is a wasteful number, since it uses less digits than its factorization.

18825951394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338181.

The product of its digits is 3110400, while the sum is 55.

The spelling of 18825951394 in words is "eighteen billion, eight hundred twenty-five million, nine hundred fifty-one thousand, three hundred ninety-four".