21141672553 has 2 divisors, whose sum is σ = 21141672554. Its totient is φ = 21141672552.

The previous prime is 21141672527. The next prime is 21141672557. The reversal of 21141672553 is 35527614112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12779850304 + 8361822249 = 113048^2 + 91443^2 .

It is a cyclic number.

It is not a de Polignac number, because 21141672553 - 2²⁵ = 21108118121 is a prime.

It is a super-3 number, since 3×21141672553³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (21141672557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570836276 + 10570836277.

It is an arithmetic number, because the mean of its divisors is an integer number (10570836277).

Almost surely, 2^21141672553 is an apocalyptic number.

It is an amenable number.

21141672553 is a deficient number, since it is larger than the sum of its proper divisors (1).

21141672553 is an equidigital number, since it uses as much as digits as its factorization.

21141672553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 37.

The spelling of 21141672553 in words is "twenty-one billion, one hundred forty-one million, six hundred seventy-two thousand, five hundred fifty-three".