21426093052 has 288 divisors, whose sum is σ = 52242247680. Its totient is φ = 7457495040.

The previous prime is 21426093041. The next prime is 21426093053. The reversal of 21426093052 is 25039062412.

It is a junction number, because it is equal to n+sod(n) for n = 21426092999 and 21426093017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21426093053) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 293508088 + ... + 293508160.

Almost surely, 2^21426093052 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21426093052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26121123840).

21426093052 is an abundant number, since it is smaller than the sum of its proper divisors (30816154628).

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

21426093052 is a wasteful number, since it uses less digits than its factorization.

21426093052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 21426093052 in words is "twenty-one billion, four hundred twenty-six million, ninety-three thousand, fifty-two".