19232021 has 2 divisors, whose sum is σ = 19232022. Its totient is φ = 19232020.

The previous prime is 19232011. The next prime is 19232033. The reversal of 19232021 is 12023291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18447025 + 784996 = 4295^2 + 886^2 .

It is a cyclic number.

It is not a de Polignac number, because 19232021 - 2¹⁸ = 18969877 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19231984 and 19232002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19232011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9616010 + 9616011.

It is an arithmetic number, because the mean of its divisors is an integer number (9616011).

Almost surely, 2^19232021 is an apocalyptic number.

It is an amenable number.

19232021 is a deficient number, since it is larger than the sum of its proper divisors (1).

19232021 is an equidigital number, since it uses as much as digits as its factorization.

19232021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 19232021 is about 4385.4328178642. The cubic root of 19232021 is about 267.9219578583.

The spelling of 19232021 in words is "nineteen million, two hundred thirty-two thousand, twenty-one".