21482018253 has 12 divisors (see below), whose sum is σ = 31031568828. Its totient is φ = 14320428480.

The previous prime is 21482018209. The next prime is 21482018263. The reversal of 21482018253 is 35281028412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12477336804 + 9004681449 = 111702^2 + 94893^2 .

It is not a de Polignac number, because 21482018253 - 2⁶ = 21482018189 is a prime.

It is a super-2 number, since 2×21482018253² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21482018263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91323 + ... + 226503.

It is an arithmetic number, because the mean of its divisors is an integer number (2585964069).

Almost surely, 2^21482018253 is an apocalyptic number.

It is an amenable number.

21482018253 is a deficient number, since it is larger than the sum of its proper divisors (9549550575).

21482018253 is a wasteful number, since it uses less digits than its factorization.

21482018253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152844 (or 152841 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The spelling of 21482018253 in words is "twenty-one billion, four hundred eighty-two million, eighteen thousand, two hundred fifty-three".