21936003469 has 2 divisors, whose sum is σ = 21936003470. Its totient is φ = 21936003468.

The previous prime is 21936003407. The next prime is 21936003473. The reversal of 21936003469 is 96430063912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15734440969 + 6201562500 = 125437^2 + 78750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21936003469 is a prime.

It is a super-2 number, since 2×21936003469² (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 (21936003269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10968001734 + 10968001735.

It is an arithmetic number, because the mean of its divisors is an integer number (10968001735).

Almost surely, 2^21936003469 is an apocalyptic number.

It is an amenable number.

21936003469 is a deficient number, since it is larger than the sum of its proper divisors (1).

21936003469 is an equidigital number, since it uses as much as digits as its factorization.

21936003469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 43.

The spelling of 21936003469 in words is "twenty-one billion, nine hundred thirty-six million, three thousand, four hundred sixty-nine".