1812620117 has 8 divisors (see below), whose sum is σ = 2259890112. Its totient is φ = 1412431200.

The previous prime is 1812620113. The next prime is 1812620137. The reversal of 1812620117 is 7110262181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1812620117 - 2² = 1812620113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1812620117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812620111) 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, 11770184 + ... + 11770337.

It is an arithmetic number, because the mean of its divisors is an integer number (282486264).

Almost surely, 2^1812620117 is an apocalyptic number.

It is an amenable number.

1812620117 is a deficient number, since it is larger than the sum of its proper divisors (447269995).

1812620117 is a wasteful number, since it uses less digits than its factorization.

1812620117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23540539.

The product of its (nonzero) digits is 1344, while the sum is 29.

The square root of 1812620117 is about 42574.8765940666. The cubic root of 1812620117 is about 1219.2766734887.

Adding to 1812620117 its reverse (7110262181), we get a palindrome (8922882298).

The spelling of 1812620117 in words is "one billion, eight hundred twelve million, six hundred twenty thousand, one hundred seventeen".