21324122020 has 48 divisors (see below), whose sum is σ = 47164457088. Its totient is φ = 8082525440.

The previous prime is 21324122003. The next prime is 21324122041. The reversal of 21324122020 is 2022142312.

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, 167401 + ... + 265840.

It is an arithmetic number, because the mean of its divisors is an integer number (982592856).

Almost surely, 2^21324122020 is an apocalyptic number.

21324122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21324122020 is an abundant number, since it is smaller than the sum of its proper divisors (25840335068).

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

21324122020 is a wasteful number, since it uses less digits than its factorization.

21324122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433380 (or 433378 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21324122020 its reverse (2022142312), we get a palindrome (23346264332).

The spelling of 21324122020 in words is "twenty-one billion, three hundred twenty-four million, one hundred twenty-two thousand, twenty".