22021020020 has 24 divisors (see below), whose sum is σ = 46282005504. Its totient is φ = 8801195936.

The previous prime is 22021020017. The next prime is 22021020037. The reversal of 22021020020 is 2002012022.

It is a junction number, because it is equal to n+sod(n) for n = 22021019983 and 22021020010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 425684 + ... + 474603.

It is an arithmetic number, because the mean of its divisors is an integer number (1928416896).

Almost surely, 2^22021020020 is an apocalyptic number.

22021020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22021020020 is an abundant number, since it is smaller than the sum of its proper divisors (24260985484).

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

22021020020 is a wasteful number, since it uses less digits than its factorization.

22021020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901519 (or 901517 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 22021020020 its reverse (2002012022), we get a palindrome (24023032042).

The spelling of 22021020020 in words is "twenty-two billion, twenty-one million, twenty thousand, twenty".