21034415143 has 4 divisors (see below), whose sum is σ = 24039331600. Its totient is φ = 18029498688.

The previous prime is 21034415137. The next prime is 21034415161. The reversal of 21034415143 is 34151443012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21034415143 - 2²¹ = 21032317991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21034415243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1502458218 + ... + 1502458231.

It is an arithmetic number, because the mean of its divisors is an integer number (6009832900).

Almost surely, 2^21034415143 is an apocalyptic number.

21034415143 is a deficient number, since it is larger than the sum of its proper divisors (3004916457).

21034415143 is an equidigital number, since it uses as much as digits as its factorization.

21034415143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3004916456.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 21034415143 its reverse (34151443012), we get a palindrome (55185858155).

The spelling of 21034415143 in words is "twenty-one billion, thirty-four million, four hundred fifteen thousand, one hundred forty-three".