21033414053 has 2 divisors, whose sum is σ = 21033414054. Its totient is φ = 21033414052.

The previous prime is 21033414011. The next prime is 21033414091. The reversal of 21033414053 is 35041433012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20937511204 + 95902849 = 144698^2 + 9793^2 .

It is a cyclic number.

It is not a de Polignac number, because 21033414053 - 2²² = 21029219749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21033414653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516707026 + 10516707027.

It is an arithmetic number, because the mean of its divisors is an integer number (10516707027).

Almost surely, 2^21033414053 is an apocalyptic number.

It is an amenable number.

21033414053 is a deficient number, since it is larger than the sum of its proper divisors (1).

21033414053 is an equidigital number, since it uses as much as digits as its factorization.

21033414053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 21033414053 its reverse (35041433012), we get a palindrome (56074847065).

The spelling of 21033414053 in words is "twenty-one billion, thirty-three million, four hundred fourteen thousand, fifty-three".