21124300104 has 24 divisors (see below), whose sum is σ = 57211646310. Its totient is φ = 7041433344.

The previous prime is 21124300103. The next prime is 21124300133. The reversal of 21124300104 is 40100342112.

It can be written as a sum of positive squares in only one way, i.e., 19318220100 + 1806080004 = 138990^2 + 42498^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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

It is not an unprimeable number, because it can be changed into a prime (21124300103) 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, 146696457 + ... + 146696600.

Almost surely, 2^21124300104 is an apocalyptic number.

21124300104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21124300104 is an abundant number, since it is smaller than the sum of its proper divisors (36087346206).

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

21124300104 is a wasteful number, since it uses less digits than its factorization.

21124300104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293393069 (or 293393062 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21124300104 its reverse (40100342112), we get a palindrome (61224642216).

The spelling of 21124300104 in words is "twenty-one billion, one hundred twenty-four million, three hundred thousand, one hundred four".