21253403223046 has 16 divisors (see below), whose sum is σ = 34191174999600. Its totient is φ = 9877450553568.

The previous prime is 21253403223029. The next prime is 21253403223097. The reversal of 21253403223046 is 64032230435212.

It is a super-2 number, since 2×21253403223046² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21253403222996 and 21253403223014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5276413881 + ... + 5276417908.

It is an arithmetic number, because the mean of its divisors is an integer number (2136948437475).

Almost surely, 2^{21253403223046} is an apocalyptic number.

21253403223046 is a deficient number, since it is larger than the sum of its proper divisors (12937771776554).

21253403223046 is a wasteful number, since it uses less digits than its factorization.

21253403223046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10552831863.

The product of its (nonzero) digits is 207360, while the sum is 37.

Adding to 21253403223046 its reverse (64032230435212), we get a palindrome (85285633658258).

The spelling of 21253403223046 in words is "twenty-one trillion, two hundred fifty-three billion, four hundred three million, two hundred twenty-three thousand, forty-six".