21323043774 has 40 divisors (see below), whose sum is σ = 47795382360. Its totient is φ = 7105305744.

The previous prime is 21323043767. The next prime is 21323043809. The reversal of 21323043774 is 47734032312.

21323043774 is a `hidden beast` number, since 213 + 2 + 3 + 0 + 437 + 7 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 502717 + ... + 543479.

It is an arithmetic number, because the mean of its divisors is an integer number (1194884559).

Almost surely, 2^21323043774 is an apocalyptic number.

21323043774 is an abundant number, since it is smaller than the sum of its proper divisors (26472338586).

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

21323043774 is a wasteful number, since it uses less digits than its factorization.

21323043774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44006 (or 43997 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 36.

The spelling of 21323043774 in words is "twenty-one billion, three hundred twenty-three million, forty-three thousand, seven hundred seventy-four".