18834516 has 72 divisors (see below), whose sum is σ = 50930880. Its totient is φ = 5865552.

The previous prime is 18834509. The next prime is 18834523. The reversal of 18834516 is 61543881.

18834516 = 224² + 225² + ... + 407².

It is an interprime number because it is at equal distance from previous prime (18834509) and next prime (18834523).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 437991 + ... + 438033.

Almost surely, 2^18834516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18834516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25465440).

18834516 is an abundant number, since it is smaller than the sum of its proper divisors (32096364).

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

18834516 is a wasteful number, since it uses less digits than its factorization.

18834516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 71 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 18834516 is about 4339.8751134105. The cubic root of 18834516 is about 266.0632069443.

The spelling of 18834516 in words is "eighteen million, eight hundred thirty-four thousand, five hundred sixteen".