21253612366032 has 160 divisors (see below), whose sum is σ = 56469354480000. Its totient is φ = 6884481171456.

The previous prime is 21253612366027. The next prime is 21253612366153. The reversal of 21253612366032 is 23066321635212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 323398008 + ... + 323463720.

It is an arithmetic number, because the mean of its divisors is an integer number (352933465500).

Almost surely, 2^{21253612366032} 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 21253612366032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28234677240000).

21253612366032 is an abundant number, since it is smaller than the sum of its proper divisors (35215742113968).

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

21253612366032 is a wasteful number, since it uses less digits than its factorization.

21253612366032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66565 (or 66559 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 42.

The spelling of 21253612366032 in words is "twenty-one trillion, two hundred fifty-three billion, six hundred twelve million, three hundred sixty-six thousand, thirty-two".