19782853 has 2 divisors, whose sum is σ = 19782854. Its totient is φ = 19782852.

The previous prime is 19782811. The next prime is 19782887. The reversal of 19782853 is 35828791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11847364 + 7935489 = 3442^2 + 2817^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19782853 is a prime.

It is a super-2 number, since 2×19782853² = 782722545639218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19782953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9891426 + 9891427.

It is an arithmetic number, because the mean of its divisors is an integer number (9891427).

Almost surely, 2^19782853 is an apocalyptic number.

It is an amenable number.

19782853 is a deficient number, since it is larger than the sum of its proper divisors (1).

19782853 is an equidigital number, since it uses as much as digits as its factorization.

19782853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 43.

The square root of 19782853 is about 4447.7919240900. The cubic root of 19782853 is about 270.4558053083.

It can be divided in two parts, 197 and 82853, that multiplied together give a triangular number (16322041 = T₅₇₁₃).

The spelling of 19782853 in words is "nineteen million, seven hundred eighty-two thousand, eight hundred fifty-three".