21263423402140 has 48 divisors (see below), whose sum is σ = 46094133415680. Its totient is φ = 8230909962240.

The previous prime is 21263423402099. The next prime is 21263423402153. The reversal of 21263423402140 is 4120432436212.

It is a junction number, because it is equal to n+sod(n) for n = 21263423402096 and 21263423402105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85826284 + ... + 86073676.

It is an arithmetic number, because the mean of its divisors is an integer number (960294446160).

Almost surely, 2^{21263423402140} is an apocalyptic number.

21263423402140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21263423402140 is an abundant number, since it is smaller than the sum of its proper divisors (24830710013540).

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

21263423402140 is a wasteful number, since it uses less digits than its factorization.

21263423402140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386062 (or 386060 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

Adding to 21263423402140 its reverse (4120432436212), we get a palindrome (25383855838352).

The spelling of 21263423402140 in words is "twenty-one trillion, two hundred sixty-three billion, four hundred twenty-three million, four hundred two thousand, one hundred forty".