21434367782 has 8 divisors (see below), whose sum is σ = 33549445296. Its totient is φ = 10251219352.

The previous prime is 21434367707. The next prime is 21434367797. The reversal of 21434367782 is 28776343412.

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

It is a congruent number.

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, 232982213 + ... + 232982304.

It is an arithmetic number, because the mean of its divisors is an integer number (4193680662).

Almost surely, 2^21434367782 is an apocalyptic number.

21434367782 is a deficient number, since it is larger than the sum of its proper divisors (12115077514).

21434367782 is a wasteful number, since it uses less digits than its factorization.

21434367782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465964542.

The product of its digits is 1354752, while the sum is 47.

The spelling of 21434367782 in words is "twenty-one billion, four hundred thirty-four million, three hundred sixty-seven thousand, seven hundred eighty-two".