21510134043 has 8 divisors (see below), whose sum is σ = 28684446528. Its totient is φ = 14337955464.

The previous prime is 21510134029. The next prime is 21510134081. The reversal of 21510134043 is 34043101512.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21510134043 - 2¹⁰ = 21510133019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21510134143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 509805 + ... + 550382.

It is an arithmetic number, because the mean of its divisors is an integer number (3585555816).

Almost surely, 2^21510134043 is an apocalyptic number.

21510134043 is a deficient number, since it is larger than the sum of its proper divisors (7174312485).

21510134043 is a wasteful number, since it uses less digits than its factorization.

21510134043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066953.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 21510134043 its reverse (34043101512), we get a palindrome (55553235555).

The spelling of 21510134043 in words is "twenty-one billion, five hundred ten million, one hundred thirty-four thousand, forty-three".