1920950181 has 8 divisors (see below), whose sum is σ = 2845852160. Its totient is φ = 1280633436.

The previous prime is 1920950153. The next prime is 1920950183. The reversal of 1920950181 is 1810590291.

It is not a de Polignac number, because 1920950181 - 2⁵ = 1920950149 is a prime.

It is a super-2 number, since 2×1920950181² = 7380099195767865522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920950183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35573125 + ... + 35573178.

It is an arithmetic number, because the mean of its divisors is an integer number (355731520).

Almost surely, 2^1920950181 is an apocalyptic number.

It is an amenable number.

1920950181 is a deficient number, since it is larger than the sum of its proper divisors (924901979).

1920950181 is an equidigital number, since it uses as much as digits as its factorization.

1920950181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71146312 (or 71146306 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 36.

The square root of 1920950181 is about 43828.6456669608. The cubic root of 1920950181 is about 1243.0979986582.

The spelling of 1920950181 in words is "one billion, nine hundred twenty million, nine hundred fifty thousand, one hundred eighty-one".