21322011020 has 96 divisors (see below), whose sum is σ = 45974174400. Its totient is φ = 8304768000.

The previous prime is 21322010999. The next prime is 21322011119. The reversal of 21322011020 is 2011022312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21322010986 and 21322011004.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39411950 + ... + 39412490.

It is an arithmetic number, because the mean of its divisors is an integer number (478897650).

Almost surely, 2^21322011020 is an apocalyptic number.

21322011020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21322011020 is an abundant number, since it is smaller than the sum of its proper divisors (24652163380).

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

21322011020 is a wasteful number, since it uses less digits than its factorization.

21322011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939 (or 937 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21322011020 its reverse (2011022312), we get a palindrome (23333033332).

The spelling of 21322011020 in words is "twenty-one billion, three hundred twenty-two million, eleven thousand, twenty".