20621890235232 has 1152 divisors, whose sum is σ = 74483731865088. Its totient is φ = 5527952179200.

The previous prime is 20621890235227. The next prime is 20621890235407. The reversal of 20621890235232 is 23253209812602.

20621890235232 is a `hidden beast` number, since 2 + 0 + 6 + 2 + 18 + 90 + 23 + 523 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2756564932 + ... + 2756572412.

It is an arithmetic number, because the mean of its divisors is an integer number (64656017244).

Almost surely, 2^{20621890235232} is an apocalyptic number.

20621890235232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20621890235232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37241865932544).

20621890235232 is an abundant number, since it is smaller than the sum of its proper divisors (53861841629856).

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

20621890235232 is a wasteful number, since it uses less digits than its factorization.

20621890235232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7634 (or 7614 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 20621890235232 in words is "twenty trillion, six hundred twenty-one billion, eight hundred ninety million, two hundred thirty-five thousand, two hundred thirty-two".