1920957820 has 12 divisors (see below), whose sum is σ = 4034011464. Its totient is φ = 768383120.

The previous prime is 1920957799. The next prime is 1920957847. The reversal of 1920957820 is 287590291.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48023926 + ... + 48023965.

It is an arithmetic number, because the mean of its divisors is an integer number (336167622).

Almost surely, 2^1920957820 is an apocalyptic number.

1920957820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1920957820 is an abundant number, since it is smaller than the sum of its proper divisors (2113053644).

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

1920957820 is a wasteful number, since it uses less digits than its factorization.

1920957820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96047900 (or 96047898 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 1920957820 is about 43828.7328130759. The cubic root of 1920957820 is about 1243.0996464561.

The spelling of 1920957820 in words is "one billion, nine hundred twenty million, nine hundred fifty-seven thousand, eight hundred twenty".