20041521040 has 80 divisors (see below), whose sum is σ = 48693312000. Its totient is φ = 7656889856.

The previous prime is 20041521037. The next prime is 20041521061. The reversal of 20041521040 is 4012514002.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 20041520999 and 20041521017.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1315386 + ... + 1330534.

It is an arithmetic number, because the mean of its divisors is an integer number (608666400).

Almost surely, 2^20041521040 is an apocalyptic number.

20041521040 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 20041521040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24346656000).

20041521040 is an abundant number, since it is smaller than the sum of its proper divisors (28651790960).

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

20041521040 is a wasteful number, since it uses less digits than its factorization.

20041521040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15904 (or 15898 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The spelling of 20041521040 in words is "twenty billion, forty-one million, five hundred twenty-one thousand, forty".