21336715043 has 4 divisors (see below), whose sum is σ = 24384817200. Its totient is φ = 18288612888.

The previous prime is 21336715039. The next prime is 21336715069. The reversal of 21336715043 is 34051763312.

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

It is not a de Polignac number, because 21336715043 - 2² = 21336715039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21336714994 and 21336715012.

It is not an unprimeable number, because it can be changed into a prime (21336715013) 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, 1524051068 + ... + 1524051081.

It is an arithmetic number, because the mean of its divisors is an integer number (6096204300).

Almost surely, 2^21336715043 is an apocalyptic number.

21336715043 is a deficient number, since it is larger than the sum of its proper divisors (3048102157).

21336715043 is an equidigital number, since it uses as much as digits as its factorization.

21336715043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3048102156.

The product of its (nonzero) digits is 45360, while the sum is 35.

It can be divided in two parts, 2133 and 6715043, that added together give a palindrome (6717176).

The spelling of 21336715043 in words is "twenty-one billion, three hundred thirty-six million, seven hundred fifteen thousand, forty-three".