18125534 has 16 divisors (see below), whose sum is σ = 31151328. Its totient is φ = 7748352.

The previous prime is 18125531. The next prime is 18125543. The reversal of 18125534 is 43552181.

It is a junction number, because it is equal to n+sod(n) for n = 18125497 and 18125506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18125531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4982 + ... + 7814.

It is an arithmetic number, because the mean of its divisors is an integer number (1946958).

Almost surely, 2^18125534 is an apocalyptic number.

18125534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18125534 is a deficient number, since it is larger than the sum of its proper divisors (13025794).

18125534 is a wasteful number, since it uses less digits than its factorization.

18125534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3299.

The product of its digits is 4800, while the sum is 29.

The square root of 18125534 is about 4257.4093061391. The cubic root of 18125534 is about 262.6819732921.

The spelling of 18125534 in words is "eighteen million, one hundred twenty-five thousand, five hundred thirty-four".