1900181045 has 12 divisors (see below), whose sum is σ = 2652497964. Its totient is φ = 1302981120.

The previous prime is 1900181027. The next prime is 1900181071. The reversal of 1900181045 is 5401810091.

It can be written as a sum of positive squares in 2 ways, for example, as 647091844 + 1253089201 = 25438^2 + 35399^2 .

It is not a de Polignac number, because 1900181045 - 2⁶ = 1900180981 is a prime.

It is a super-2 number, since 2×1900181045² = 7221376007554584050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1900180999 and 1900181017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3877676 + ... + 3878165.

It is an arithmetic number, because the mean of its divisors is an integer number (221041497).

Almost surely, 2^1900181045 is an apocalyptic number.

It is an amenable number.

1900181045 is a deficient number, since it is larger than the sum of its proper divisors (752316919).

1900181045 is an equidigital number, since it uses as much as digits as its factorization.

1900181045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7755860 (or 7755853 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 1900181045 is about 43591.0661145148. The cubic root of 1900181045 is about 1238.6016679451.

The spelling of 1900181045 in words is "one billion, nine hundred million, one hundred eighty-one thousand, forty-five".