1974421836 has 18 divisors (see below), whose sum is σ = 4990899732. Its totient is φ = 658140600.

The previous prime is 1974421759. The next prime is 1974421849. The reversal of 1974421836 is 6381244791.

1974421836 is a `hidden beast` number, since 197 + 4 + 421 + 8 + 36 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×1974421836² = 7796683172947221792, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1974421791 and 1974421800.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27422490 + ... + 27422561.

Almost surely, 2^1974421836 is an apocalyptic number.

It is an amenable number.

1974421836 is an abundant number, since it is smaller than the sum of its proper divisors (3016477896).

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

1974421836 is a wasteful number, since it uses less digits than its factorization.

1974421836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54845061 (or 54845056 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 1974421836 is about 44434.4667572370. The cubic root of 1974421836 is about 1254.5269108848.

The spelling of 1974421836 in words is "one billion, nine hundred seventy-four million, four hundred twenty-one thousand, eight hundred thirty-six".