21202020096 has 72 divisors (see below), whose sum is σ = 56504000784. Its totient is φ = 7057858560.

The previous prime is 21202020043. The next prime is 21202020097. The reversal of 21202020096 is 69002020212.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202020097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 566310 + ... + 602586.

Almost surely, 2^21202020096 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21202020096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28252000392).

21202020096 is an abundant number, since it is smaller than the sum of its proper divisors (35301980688).

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

21202020096 is an equidigital number, since it uses as much as digits as its factorization.

21202020096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37057 (or 37043 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The spelling of 21202020096 in words is "twenty-one billion, two hundred two million, twenty thousand, ninety-six".