19282540021 has 2 divisors, whose sum is σ = 19282540022. Its totient is φ = 19282540020.

The previous prime is 19282540007. The next prime is 19282540063. The reversal of 19282540021 is 12004528291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18519399396 + 763140625 = 136086^2 + 27625^2 .

It is a cyclic number.

It is not a de Polignac number, because 19282540021 - 2¹⁷ = 19282408949 is a prime.

It is a super-2 number, since 2×19282540021² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19282541021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9641270010 + 9641270011.

It is an arithmetic number, because the mean of its divisors is an integer number (9641270011).

Almost surely, 2^19282540021 is an apocalyptic number.

It is an amenable number.

19282540021 is a deficient number, since it is larger than the sum of its proper divisors (1).

19282540021 is an equidigital number, since it uses as much as digits as its factorization.

19282540021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 34.

The spelling of 19282540021 in words is "nineteen billion, two hundred eighty-two million, five hundred forty thousand, twenty-one".