21890079103 has 2 divisors, whose sum is σ = 21890079104. Its totient is φ = 21890079102.

The previous prime is 21890078993. The next prime is 21890079109. The reversal of 21890079103 is 30197009812.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21890079103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21890079109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10945039551 + 10945039552.

It is an arithmetic number, because the mean of its divisors is an integer number (10945039552).

Almost surely, 2^21890079103 is an apocalyptic number.

21890079103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21890079103 is an equidigital number, since it uses as much as digits as its factorization.

21890079103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 40.

The spelling of 21890079103 in words is "twenty-one billion, eight hundred ninety million, seventy-nine thousand, one hundred three".