19932481 has 2 divisors, whose sum is σ = 19932482. Its totient is φ = 19932480.

The previous prime is 19932443. The next prime is 19932487. The reversal of 19932481 is 18423991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15872256 + 4060225 = 3984^2 + 2015^2 .

It is a cyclic number.

It is not a de Polignac number, because 19932481 - 2¹¹ = 19930433 is a prime.

It is a super-2 number, since 2×19932481² = 794607597630722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19932481.

It is not a weakly prime, because it can be changed into another prime (19932487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9966240 + 9966241.

It is an arithmetic number, because the mean of its divisors is an integer number (9966241).

Almost surely, 2^19932481 is an apocalyptic number.

It is an amenable number.

19932481 is a deficient number, since it is larger than the sum of its proper divisors (1).

19932481 is an equidigital number, since it uses as much as digits as its factorization.

19932481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 37.

The square root of 19932481 is about 4464.5807193957. The cubic root of 19932481 is about 271.1359593380.

The spelling of 19932481 in words is "nineteen million, nine hundred thirty-two thousand, four hundred eighty-one".