1620170023 has 8 divisors (see below), whose sum is σ = 1761838992. Its totient is φ = 1483652736.

The previous prime is 1620170021. The next prime is 1620170093. The reversal of 1620170023 is 3200710261.

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 1620170023 - 2¹ = 1620170021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1620169976 and 1620170003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620170021) 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, 1287265 + ... + 1288522.

It is an arithmetic number, because the mean of its divisors is an integer number (220229874).

Almost surely, 2^1620170023 is an apocalyptic number.

1620170023 is a deficient number, since it is larger than the sum of its proper divisors (141668969).

1620170023 is a wasteful number, since it uses less digits than its factorization.

1620170023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2575841.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 1620170023 is about 40251.3356672794. The cubic root of 1620170023 is about 1174.5013784159.

Adding to 1620170023 its reverse (3200710261), we get a palindrome (4820880284).

The spelling of 1620170023 in words is "one billion, six hundred twenty million, one hundred seventy thousand, twenty-three".