19006525418 has 4 divisors (see below), whose sum is σ = 28509788130. Its totient is φ = 9503262708.

The previous prime is 19006525403. The next prime is 19006525423. The reversal of 19006525418 is 81452560091.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18522393409 + 484132009 = 136097^2 + 22003^2 .

It is a super-2 number, since 2×19006525418² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4751631353 + ... + 4751631356.

Almost surely, 2^19006525418 is an apocalyptic number.

19006525418 is a deficient number, since it is larger than the sum of its proper divisors (9503262712).

19006525418 is an equidigital number, since it uses as much as digits as its factorization.

19006525418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9503262711.

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 19006525418 in words is "nineteen billion, six million, five hundred twenty-five thousand, four hundred eighteen".