20531333000 has 96 divisors (see below), whose sum is σ = 49759149960. Its totient is φ = 7929017600.

The previous prime is 20531332993. The next prime is 20531333021. The reversal of 20531333000 is 33313502.

It can be written as a sum of positive squares in 12 ways, for example, as 2391014404 + 18140318596 = 48898^2 + 134686^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 828794 + ... + 853206.

Almost surely, 2^20531333000 is an apocalyptic number.

20531333000 is a gapful number since it is divisible by the number (20) 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 20531333000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24879574980).

20531333000 is an abundant number, since it is smaller than the sum of its proper divisors (29227816960).

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

20531333000 is a wasteful number, since it uses less digits than its factorization.

20531333000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24492 (or 24449 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 20.

Adding to 20531333000 its reverse (33313502), we get a palindrome (20564646502).

The spelling of 20531333000 in words is "twenty billion, five hundred thirty-one million, three hundred thirty-three thousand".