21150003024 has 30 divisors (see below), whose sum is σ = 59190633866. Its totient is φ = 7050000960.

The previous prime is 21150003023. The next prime is 21150003067. The reversal of 21150003024 is 42030005112.

It can be written as a sum of positive squares in only one way, i.e., 21131855424 + 18147600 = 145368^2 + 4260^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21150002988 and 21150003006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21150003023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73437367 + ... + 73437654.

Almost surely, 2^21150003024 is an apocalyptic number.

21150003024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21150003024 is an abundant number, since it is smaller than the sum of its proper divisors (38040630842).

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

21150003024 is a wasteful number, since it uses less digits than its factorization.

21150003024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146875035 (or 146875026 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 21150003024 its reverse (42030005112), we get a palindrome (63180008136).

The spelling of 21150003024 in words is "twenty-one billion, one hundred fifty million, three thousand, twenty-four".