1821922343 has 2 divisors, whose sum is σ = 1821922344. Its totient is φ = 1821922342.

The previous prime is 1821922337. The next prime is 1821922363. The reversal of 1821922343 is 3432291281.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1821922343 - 2⁴ = 1821922327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1821922363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910961171 + 910961172.

It is an arithmetic number, because the mean of its divisors is an integer number (910961172).

Almost surely, 2^1821922343 is an apocalyptic number.

1821922343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1821922343 is an equidigital number, since it uses as much as digits as its factorization.

1821922343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 35.

The square root of 1821922343 is about 42683.9822767276. The cubic root of 1821922343 is about 1221.3588601401.

The spelling of 1821922343 in words is "one billion, eight hundred twenty-one million, nine hundred twenty-two thousand, three hundred forty-three".