20031521352 has 16 divisors (see below), whose sum is σ = 50078803440. Its totient is φ = 6677173776.

The previous prime is 20031521351. The next prime is 20031521357. The reversal of 20031521352 is 25312513002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 834646723 = 20031521352 / (2 + 0 + 0 + 3 + 1 + 5 + 2 + 1 + 3 + 5 + 2).

It is not an unprimeable number, because it can be changed into a prime (20031521351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 417323338 + ... + 417323385.

It is an arithmetic number, because the mean of its divisors is an integer number (3129925215).

Almost surely, 2^20031521352 is an apocalyptic number.

It is an amenable number.

20031521352 is an abundant number, since it is smaller than the sum of its proper divisors (30047282088).

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

20031521352 is a wasteful number, since it uses less digits than its factorization.

20031521352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834646732 (or 834646728 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The spelling of 20031521352 in words is "twenty billion, thirty-one million, five hundred twenty-one thousand, three hundred fifty-two".