21010000024 has 32 divisors (see below), whose sum is σ = 42900732000. Its totient is φ = 9587964672.

The previous prime is 21010000021. The next prime is 21010000031. The reversal of 21010000024 is 42000001012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010000021) 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, 1125684 + ... + 1144195.

It is an arithmetic number, because the mean of its divisors is an integer number (1340647875).

Almost surely, 2^21010000024 is an apocalyptic number.

It is an amenable number.

21010000024 is an abundant number, since it is smaller than the sum of its proper divisors (21890731976).

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

21010000024 is a wasteful number, since it uses less digits than its factorization.

21010000024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2269987 (or 2269983 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21010000024 its reverse (42000001012), we get a palindrome (63010001036).

The spelling of 21010000024 in words is "twenty-one billion, ten million, twenty-four", and thus it is an aban number.