26421019 has 2 divisors, whose sum is σ = 26421020. Its totient is φ = 26421018.

The previous prime is 26420993. The next prime is 26421029. The reversal of 26421019 is 91012462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26421019 - 2⁵ = 26420987 is a prime.

It is a super-2 number, since 2×26421019² = 1396140489996722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26420984 and 26421002.

It is not a weakly prime, because it can be changed into another prime (26421029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13210509 + 13210510.

It is an arithmetic number, because the mean of its divisors is an integer number (13210510).

Almost surely, 2^26421019 is an apocalyptic number.

26421019 is a deficient number, since it is larger than the sum of its proper divisors (1).

26421019 is an equidigital number, since it uses as much as digits as its factorization.

26421019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 26421019 is about 5140.1380331660. The cubic root of 26421019 is about 297.8401128702.

The spelling of 26421019 in words is "twenty-six million, four hundred twenty-one thousand, nineteen".