21774254902 has 16 divisors (see below), whose sum is σ = 32951255040. Its totient is φ = 10790673768.

The previous prime is 21774254881. The next prime is 21774254917. The reversal of 21774254902 is 20945247712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216763 + ... + 300889.

It is an arithmetic number, because the mean of its divisors is an integer number (2059453440).

Almost surely, 2^21774254902 is an apocalyptic number.

21774254902 is a deficient number, since it is larger than the sum of its proper divisors (11177000138).

21774254902 is a wasteful number, since it uses less digits than its factorization.

21774254902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85275.

The product of its (nonzero) digits is 282240, while the sum is 43.

It can be divided in two parts, 21774 and 254902, that added together give a square (276676 = 526²).

The spelling of 21774254902 in words is "twenty-one billion, seven hundred seventy-four million, two hundred fifty-four thousand, nine hundred two".