18774396 has 48 divisors (see below), whose sum is σ = 49082880. Its totient is φ = 6205680.

The previous prime is 18774391. The next prime is 18774401. The reversal of 18774396 is 69347781.

It is an interprime number because it is at equal distance from previous prime (18774391) and next prime (18774401).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18774391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13485 + ... + 14811.

It is an arithmetic number, because the mean of its divisors is an integer number (1022560).

Almost surely, 2^18774396 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 18774396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24541440).

18774396 is an abundant number, since it is smaller than the sum of its proper divisors (30308484).

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

18774396 is a wasteful number, since it uses less digits than its factorization.

18774396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471 (or 1463 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 18774396 is about 4332.9431106351. The cubic root of 18774396 is about 265.7798128863.

The spelling of 18774396 in words is "eighteen million, seven hundred seventy-four thousand, three hundred ninety-six".