20021521542441 has 8 divisors (see below), whose sum is σ = 26701359684384. Its totient is φ = 13344682214400.

The previous prime is 20021521542409. The next prime is 20021521542511. The reversal of 20021521542441 is 14424512512002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20021521542441 - 2⁵ = 20021521542409 is a prime.

It is a super-2 number, since 2×20021521542441² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20021521542401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 749687896 + ... + 749714601.

It is an arithmetic number, because the mean of its divisors is an integer number (3337669960548).

Almost surely, 2^{20021521542441} is an apocalyptic number.

It is an amenable number.

20021521542441 is a deficient number, since it is larger than the sum of its proper divisors (6679838141943).

20021521542441 is a wasteful number, since it uses less digits than its factorization.

20021521542441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499406951.

The product of its (nonzero) digits is 25600, while the sum is 33.

The spelling of 20021521542441 in words is "twenty trillion, twenty-one billion, five hundred twenty-one million, five hundred forty-two thousand, four hundred forty-one".