1918748436 has 48 divisors (see below), whose sum is σ = 4890099648. Its totient is φ = 580723200.

The previous prime is 1918748411. The next prime is 1918748437. The reversal of 1918748436 is 6348478191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918748437) 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, 104076 + ... + 121116.

It is an arithmetic number, because the mean of its divisors is an integer number (101877076).

Almost surely, 2^1918748436 is an apocalyptic number.

It is an amenable number.

1918748436 is an abundant number, since it is smaller than the sum of its proper divisors (2971351212).

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

1918748436 is a wasteful number, since it uses less digits than its factorization.

1918748436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17912 (or 17910 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 51.

The square root of 1918748436 is about 43803.5208173955. The cubic root of 1918748436 is about 1242.6228811557.

The spelling of 1918748436 in words is "one billion, nine hundred eighteen million, seven hundred forty-eight thousand, four hundred thirty-six".