20019831552 has 432 divisors, whose sum is σ = 67997110272. Its totient is φ = 5547294720.

The previous prime is 20019831547. The next prime is 20019831569. The reversal of 20019831552 is 25513891002.

20019831552 is a `hidden beast` number, since 20 + 0 + 1 + 9 + 83 + 1 + 552 = 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 47 ways as a sum of consecutive naturals, for example, 104815777 + ... + 104815967.

Almost surely, 2^20019831552 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 20019831552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33998555136).

20019831552 is an abundant number, since it is smaller than the sum of its proper divisors (47977278720).

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

20019831552 is a wasteful number, since it uses less digits than its factorization.

20019831552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The spelling of 20019831552 in words is "twenty billion, nineteen million, eight hundred thirty-one thousand, five hundred fifty-two".