21441515113020 has 48 divisors (see below), whose sum is σ = 61658843466528. Its totient is φ = 5563203920640.

The previous prime is 21441515113001. The next prime is 21441515113021. The reversal of 21441515113020 is 2031151514412.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21441515113021) 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, 4829167851 + ... + 4829172290.

It is an arithmetic number, because the mean of its divisors is an integer number (1284559238886).

Almost surely, 2^{21441515113020} is an apocalyptic number.

21441515113020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21441515113020 is an abundant number, since it is smaller than the sum of its proper divisors (40217328353508).

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

21441515113020 is a wasteful number, since it uses less digits than its factorization.

21441515113020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9658340190 (or 9658340188 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

Adding to 21441515113020 its reverse (2031151514412), we get a palindrome (23472666627432).

The spelling of 21441515113020 in words is "twenty-one trillion, four hundred forty-one billion, five hundred fifteen million, one hundred thirteen thousand, twenty".