1923485021 has 2 divisors, whose sum is σ = 1923485022. Its totient is φ = 1923485020.

The previous prime is 1923484973. The next prime is 1923485027. The reversal of 1923485021 is 1205843291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1321322500 + 602162521 = 36350^2 + 24539^2 .

It is a cyclic number.

It is not a de Polignac number, because 1923485021 - 2¹⁴ = 1923468637 is a prime.

It is a super-2 number, since 2×1923485021² = 7399589252022740882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1923485027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 961742510 + 961742511.

It is an arithmetic number, because the mean of its divisors is an integer number (961742511).

Almost surely, 2^1923485021 is an apocalyptic number.

It is an amenable number.

1923485021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1923485021 is an equidigital number, since it uses as much as digits as its factorization.

1923485021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 1923485021 is about 43857.5537507509. The cubic root of 1923485021 is about 1243.6445458060.

The spelling of 1923485021 in words is "one billion, nine hundred twenty-three million, four hundred eighty-five thousand, twenty-one".