21024242043 has 16 divisors (see below), whose sum is σ = 32422930176. Its totient is φ = 11869106400.

The previous prime is 21024242039. The next prime is 21024242047. The reversal of 21024242043 is 34024242012.

It is an interprime number because it is at equal distance from previous prime (21024242039) and next prime (21024242047).

It is not a de Polignac number, because 21024242043 - 2² = 21024242039 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21024242047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6029308 + ... + 6032793.

It is an arithmetic number, because the mean of its divisors is an integer number (2026433136).

Almost surely, 2^21024242043 is an apocalyptic number.

21024242043 is a deficient number, since it is larger than the sum of its proper divisors (11398688133).

21024242043 is a wasteful number, since it uses less digits than its factorization.

21024242043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12062194.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 21024242043 its reverse (34024242012), we get a palindrome (55048484055).

The spelling of 21024242043 in words is "twenty-one billion, twenty-four million, two hundred forty-two thousand, forty-three".