1620253023 has 4 divisors (see below), whose sum is σ = 2160337368. Its totient is φ = 1080168680.

The previous prime is 1620253021. The next prime is 1620253039. The reversal of 1620253023 is 3203520261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1620253023 - 2¹ = 1620253021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1620252984 and 1620253002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620253021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270042168 + ... + 270042173.

It is an arithmetic number, because the mean of its divisors is an integer number (540084342).

Almost surely, 2^1620253023 is an apocalyptic number.

1620253023 is a deficient number, since it is larger than the sum of its proper divisors (540084345).

1620253023 is an equidigital number, since it uses as much as digits as its factorization.

1620253023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540084344.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 1620253023 is about 40252.3666757621. The cubic root of 1620253023 is about 1174.5214343253.

Adding to 1620253023 its reverse (3203520261), we get a palindrome (4823773284).

The spelling of 1620253023 in words is "one billion, six hundred twenty million, two hundred fifty-three thousand, twenty-three".