20531443020 has 48 divisors (see below), whose sum is σ = 62714227968. Its totient is φ = 4977319360.

The previous prime is 20531442983. The next prime is 20531443027. The reversal of 20531443020 is 2034413502.

It is not an unprimeable number, because it can be changed into a prime (20531443027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15553464 + ... + 15554783.

It is an arithmetic number, because the mean of its divisors is an integer number (1306546416).

Almost surely, 2^20531443020 is an apocalyptic number.

20531443020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20531443020 is an abundant number, since it is smaller than the sum of its proper divisors (42182784948).

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

20531443020 is a wasteful number, since it uses less digits than its factorization.

20531443020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31108270 (or 31108268 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 20531443020 its reverse (2034413502), we get a palindrome (22565856522).

The spelling of 20531443020 in words is "twenty billion, five hundred thirty-one million, four hundred forty-three thousand, twenty".