21415434514 has 8 divisors (see below), whose sum is σ = 34012748988. Its totient is φ = 10077851520.

The previous prime is 21415434503. The next prime is 21415434533. The reversal of 21415434514 is 41543451412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21005574489 + 409860025 = 144933^2 + 20245^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 629865721 = 21415434514 / (2 + 1 + 4 + 1 + 5 + 4 + 3 + 4 + 5 + 1 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 21415434514.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314932827 + ... + 314932894.

Almost surely, 2^21415434514 is an apocalyptic number.

21415434514 is a deficient number, since it is larger than the sum of its proper divisors (12597314474).

21415434514 is a wasteful number, since it uses less digits than its factorization.

21415434514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629865740.

The product of its digits is 38400, while the sum is 34.

Adding to 21415434514 its reverse (41543451412), we get a palindrome (62958885926).

The spelling of 21415434514 in words is "twenty-one billion, four hundred fifteen million, four hundred thirty-four thousand, five hundred fourteen".