1851940325 has 12 divisors (see below), whose sum is σ = 2297019648. Its totient is φ = 1481156400.

The previous prime is 1851940303. The next prime is 1851940327. The reversal of 1851940325 is 5230491581.

It is a happy number.

It is not a de Polignac number, because 1851940325 - 2¹⁰ = 1851939301 is a prime.

It is a super-2 number, since 2×1851940325² = 6859365934722211250, 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 (1851940327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117884 + ... + 132666.

It is an arithmetic number, because the mean of its divisors is an integer number (191418304).

Almost surely, 2^1851940325 is an apocalyptic number.

It is an amenable number.

1851940325 is a deficient number, since it is larger than the sum of its proper divisors (445079323).

1851940325 is a wasteful number, since it uses less digits than its factorization.

1851940325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19804 (or 19799 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 1851940325 is about 43034.1762440040. The cubic root of 1851940325 is about 1228.0300555072.

The spelling of 1851940325 in words is "one billion, eight hundred fifty-one million, nine hundred forty thousand, three hundred twenty-five".