20235543552 has 352 divisors, whose sum is σ = 72106803200. Its totient is φ = 5476294656.

The previous prime is 20235543541. The next prime is 20235543583. The reversal of 20235543552 is 25534553202.

20235543552 is a `hidden beast` number, since 2 + 0 + 23 + 554 + 35 + 52 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 3674433 + ... + 3679935.

Almost surely, 2^20235543552 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 20235543552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36053401600).

20235543552 is an abundant number, since it is smaller than the sum of its proper divisors (51871259648).

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

20235543552 is a wasteful number, since it uses less digits than its factorization.

20235543552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5558 (or 5534 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 36.

The spelling of 20235543552 in words is "twenty billion, two hundred thirty-five million, five hundred forty-three thousand, five hundred fifty-two".