21474210126 has 32 divisors (see below), whose sum is σ = 43567354368. Its totient is φ = 7055052480.

The previous prime is 21474210113. The next prime is 21474210187. The reversal of 21474210126 is 62101247412.

It is a super-2 number, since 2×21474210126² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21474210093 and 21474210102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 634821 + ... + 667791.

It is an arithmetic number, because the mean of its divisors is an integer number (1361479824).

Almost surely, 2^21474210126 is an apocalyptic number.

21474210126 is an abundant number, since it is smaller than the sum of its proper divisors (22093144242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21474210126 is a wasteful number, since it uses less digits than its factorization.

21474210126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34536.

The product of its (nonzero) digits is 5376, while the sum is 30.

Adding to 21474210126 its reverse (62101247412), we get a palindrome (83575457538).

The spelling of 21474210126 in words is "twenty-one billion, four hundred seventy-four million, two hundred ten thousand, one hundred twenty-six".