21411103020 has 48 divisors (see below), whose sum is σ = 61571394528. Its totient is φ = 5555312640.

The previous prime is 21411103003. The next prime is 21411103027. The reversal of 21411103020 is 2030111412.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (21411103027) 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, 4820101 + ... + 4824540.

It is an arithmetic number, because the mean of its divisors is an integer number (1282737386).

Almost surely, 2^21411103020 is an apocalyptic number.

21411103020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21411103020 is an abundant number, since it is smaller than the sum of its proper divisors (40160291508).

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

21411103020 is a wasteful number, since it uses less digits than its factorization.

21411103020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9644690 (or 9644688 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21411103020 its reverse (2030111412), we get a palindrome (23441214432).

The spelling of 21411103020 in words is "twenty-one billion, four hundred eleven million, one hundred three thousand, twenty".