21424150257663 has 16 divisors (see below), whose sum is σ = 28910345619456. Its totient is φ = 14110368592320.

The previous prime is 21424150257661. The next prime is 21424150257689. The reversal of 21424150257663 is 36675205142412.

It is a happy number.

It is not a de Polignac number, because 21424150257663 - 2¹ = 21424150257661 is a prime.

It is a super-3 number, since 3×21424150257663³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21424150257661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10419331 + ... + 12304907.

It is an arithmetic number, because the mean of its divisors is an integer number (1806896601216).

Almost surely, 2^{21424150257663} is an apocalyptic number.

21424150257663 is a deficient number, since it is larger than the sum of its proper divisors (7486195361793).

21424150257663 is a wasteful number, since it uses less digits than its factorization.

21424150257663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1931294.

The product of its (nonzero) digits is 2419200, while the sum is 48.

The spelling of 21424150257663 in words is "twenty-one trillion, four hundred twenty-four billion, one hundred fifty million, two hundred fifty-seven thousand, six hundred sixty-three".