20210521344 has 144 divisors (see below), whose sum is σ = 58016078400. Its totient is φ = 6209077248.

The previous prime is 20210521249. The next prime is 20210521351. The reversal of 20210521344 is 44312501202.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9274047 + ... + 9276225.

Almost surely, 2^20210521344 is an apocalyptic number.

20210521344 is a gapful number since it is divisible by the number (24) 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 20210521344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29008039200).

20210521344 is an abundant number, since it is smaller than the sum of its proper divisors (37805557056).

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

20210521344 is a wasteful number, since it uses less digits than its factorization.

20210521344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3140 (or 3126 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The spelling of 20210521344 in words is "twenty billion, two hundred ten million, five hundred twenty-one thousand, three hundred forty-four".