1916381924 has 6 divisors (see below), whose sum is σ = 3353668374. Its totient is φ = 958190960.

The previous prime is 1916381881. The next prime is 1916381927. The reversal of 1916381924 is 4291836191.

It can be written as a sum of positive squares in only one way, i.e., 1258972324 + 657409600 = 35482^2 + 25640^2 .

It is not an unprimeable number, because it can be changed into a prime (1916381927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239547737 + ... + 239547744.

It is an arithmetic number, because the mean of its divisors is an integer number (558944729).

Almost surely, 2^1916381924 is an apocalyptic number.

It is an amenable number.

1916381924 is a deficient number, since it is larger than the sum of its proper divisors (1437286450).

1916381924 is a wasteful number, since it uses less digits than its factorization.

1916381924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479095485 (or 479095483 counting only the distinct ones).

The product of its digits is 93312, while the sum is 44.

The square root of 1916381924 is about 43776.4996773383. The cubic root of 1916381924 is about 1242.1118029082. Note that the first 3 decimals are identical.

The spelling of 1916381924 in words is "one billion, nine hundred sixteen million, three hundred eighty-one thousand, nine hundred twenty-four".