18225540004 has 27 divisors (see below), whose sum is σ = 37105840107. Its totient is φ = 7810135704.

The previous prime is 18225539987. The next prime is 18225540007. The reversal of 18225540004 is 40004552281.

The square root of 18225540004 is 135002.

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

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18225540007) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1885207 + ... + 1894849.

Almost surely, 2^18225540004 is an apocalyptic number.

18225540004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18225540004 is the 135002-nd square number.

It is an amenable number.

18225540004 is an abundant number, since it is smaller than the sum of its proper divisors (18880300103).

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

18225540004 is an frugal number, since it uses more digits than its factorization.

18225540004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19304 (or 9652 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 31.

The spelling of 18225540004 in words is "eighteen billion, two hundred twenty-five million, five hundred forty thousand, four".