21801306010 has 128 divisors (see below), whose sum is σ = 45386956800. Its totient is φ = 7462752000.

The previous prime is 21801306001. The next prime is 21801306049. The reversal of 21801306010 is 1060310812.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 56922279 + ... + 56922661.

It is an arithmetic number, because the mean of its divisors is an integer number (354585600).

Almost surely, 2^21801306010 is an apocalyptic number.

21801306010 is an abundant number, since it is smaller than the sum of its proper divisors (23585650790).

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

21801306010 is a wasteful number, since it uses less digits than its factorization.

21801306010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 21801306010 its reverse (1060310812), we get a palindrome (22861616822).

The spelling of 21801306010 in words is "twenty-one billion, eight hundred one million, three hundred six thousand, ten".