21417024774 has 16 divisors (see below), whose sum is σ = 42840654912. Its totient is φ = 7137907368.

The previous prime is 21417024767. The next prime is 21417024803. The reversal of 21417024774 is 47742071412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232564 + ... + 311319.

It is an arithmetic number, because the mean of its divisors is an integer number (2677540932).

Almost surely, 2^21417024774 is an apocalyptic number.

21417024774 is an abundant number, since it is smaller than the sum of its proper divisors (21423630138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21417024774 is a wasteful number, since it uses less digits than its factorization.

21417024774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550451.

The product of its (nonzero) digits is 87808, while the sum is 39.

The spelling of 21417024774 in words is "twenty-one billion, four hundred seventeen million, twenty-four thousand, seven hundred seventy-four".