1921145676 has 24 divisors (see below), whose sum is σ = 4487809200. Its totient is φ = 639648192.

The previous prime is 1921145627. The next prime is 1921145683. The reversal of 1921145676 is 6765411291.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80751 + ... + 101798.

It is an arithmetic number, because the mean of its divisors is an integer number (186992050).

Almost surely, 2^1921145676 is an apocalyptic number.

It is an amenable number.

1921145676 is an abundant number, since it is smaller than the sum of its proper divisors (2566663524).

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

1921145676 is a wasteful number, since it uses less digits than its factorization.

1921145676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183433 (or 183431 counting only the distinct ones).

The product of its digits is 90720, while the sum is 42.

The square root of 1921145676 is about 43830.8758297162. The cubic root of 1921145676 is about 1243.1401672340.

The spelling of 1921145676 in words is "one billion, nine hundred twenty-one million, one hundred forty-five thousand, six hundred seventy-six".