21072500419 has 2 divisors, whose sum is σ = 21072500420. Its totient is φ = 21072500418.

The previous prime is 21072500413. The next prime is 21072500429. The reversal of 21072500419 is 91400527012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21072500419 - 2⁹ = 21072499907 is a prime.

It is a super-2 number, since 2×21072500419² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21072500413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10536250209 + 10536250210.

It is an arithmetic number, because the mean of its divisors is an integer number (10536250210).

Almost surely, 2^21072500419 is an apocalyptic number.

21072500419 is a deficient number, since it is larger than the sum of its proper divisors (1).

21072500419 is an equidigital number, since it uses as much as digits as its factorization.

21072500419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 31.

The spelling of 21072500419 in words is "twenty-one billion, seventy-two million, five hundred thousand, four hundred nineteen".