21352654026 has 128 divisors (see below), whose sum is σ = 54777876480. Its totient is φ = 6101726400.

The previous prime is 21352653997. The next prime is 21352654027. The reversal of 21352654026 is 62045625312.

It is not an unprimeable number, because it can be changed into a prime (21352654027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 958996 + ... + 981008.

It is an arithmetic number, because the mean of its divisors is an integer number (427952160).

Almost surely, 2^21352654026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21352654026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27388938240).

21352654026 is an abundant number, since it is smaller than the sum of its proper divisors (33425222454).

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

21352654026 is a wasteful number, since it uses less digits than its factorization.

21352654026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22129 (or 22123 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 21352654026 in words is "twenty-one billion, three hundred fifty-two million, six hundred fifty-four thousand, twenty-six".