21405456614 has 8 divisors (see below), whose sum is σ = 32426088048. Its totient is φ = 10596760600.

The previous prime is 21405456607. The next prime is 21405456659. The reversal of 21405456614 is 41665450412.

It is a happy number.

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, 52983602 + ... + 52984005.

It is an arithmetic number, because the mean of its divisors is an integer number (4053261006).

Almost surely, 2^21405456614 is an apocalyptic number.

21405456614 is a deficient number, since it is larger than the sum of its proper divisors (11020631434).

21405456614 is a wasteful number, since it uses less digits than its factorization.

21405456614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105967710.

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 21405456614 in words is "twenty-one billion, four hundred five million, four hundred fifty-six thousand, six hundred fourteen".