21240023300004 has 12 divisors (see below), whose sum is σ = 49560054366704. Its totient is φ = 7080007766664.

The previous prime is 21240023299997. The next prime is 21240023300011. The reversal of 21240023300004 is 40000332004212.

It is an interprime number because it is at equal distance from previous prime (21240023299997) and next prime (21240023300011).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×21240023300004² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 885000970822 + ... + 885000970845.

Almost surely, 2^{21240023300004} is an apocalyptic number.

It is an amenable number.

21240023300004 is an abundant number, since it is smaller than the sum of its proper divisors (28320031066700).

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

21240023300004 is a wasteful number, since it uses less digits than its factorization.

21240023300004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770001941674 (or 1770001941672 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 21240023300004 its reverse (40000332004212), we get a palindrome (61240355304216).

The spelling of 21240023300004 in words is "twenty-one trillion, two hundred forty billion, twenty-three million, three hundred thousand, four".