21048100236 has 96 divisors (see below), whose sum is σ = 55425807360. Its totient is φ = 6906211200.

The previous prime is 21048100141. The next prime is 21048100247. The reversal of 21048100236 is 63200184012.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 5833545 + ... + 5837151.

It is an arithmetic number, because the mean of its divisors is an integer number (577352160).

Almost surely, 2^21048100236 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 21048100236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27712903680).

21048100236 is an abundant number, since it is smaller than the sum of its proper divisors (34377707124).

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

21048100236 is a wasteful number, since it uses less digits than its factorization.

21048100236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4452 (or 4444 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 21048100236 its reverse (63200184012), we get a palindrome (84248284248).

The spelling of 21048100236 in words is "twenty-one billion, forty-eight million, one hundred thousand, two hundred thirty-six".