21014405043 has 4 divisors (see below), whose sum is σ = 28019206728. Its totient is φ = 14009603360.

The previous prime is 21014405029. The next prime is 21014405051. The reversal of 21014405043 is 34050441012.

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 21014405043 - 2²⁹ = 20477534131 is a prime.

It is a super-3 number, since 3×21014405043³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (21014405003) 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, 3502400838 + ... + 3502400843.

It is an arithmetic number, because the mean of its divisors is an integer number (7004801682).

Almost surely, 2^21014405043 is an apocalyptic number.

21014405043 is a deficient number, since it is larger than the sum of its proper divisors (7004801685).

21014405043 is an equidigital number, since it uses as much as digits as its factorization.

21014405043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7004801684.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 21014405043 its reverse (34050441012), we get a palindrome (55064846055).

The spelling of 21014405043 in words is "twenty-one billion, fourteen million, four hundred five thousand, forty-three".