18750534 has 32 divisors (see below), whose sum is σ = 41250816. Its totient is φ = 5634720.

The previous prime is 18750533. The next prime is 18750539. The reversal of 18750534 is 43505781.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 18750495 and 18750504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18750533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7264 + ... + 9500.

It is an arithmetic number, because the mean of its divisors is an integer number (1289088).

Almost surely, 2^18750534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18750534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20625408).

18750534 is an abundant number, since it is smaller than the sum of its proper divisors (22500282).

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

18750534 is a wasteful number, since it uses less digits than its factorization.

18750534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 18750534 is about 4330.1886794919. The cubic root of 18750534 is about 265.6671643147.

It can be divided in two parts, 187 and 50534, that added together give a triangular number (50721 = T₃₁₈).

The spelling of 18750534 in words is "eighteen million, seven hundred fifty thousand, five hundred thirty-four".