21774286290 has 32 divisors (see below), whose sum is σ = 55332305280. Its totient is φ = 5464918784.

The previous prime is 21774286279. The next prime is 21774286291. The reversal of 21774286290 is 9268247712.

It is not an unprimeable number, because it can be changed into a prime (21774286291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21346830 + ... + 21347849.

It is an arithmetic number, because the mean of its divisors is an integer number (1729134540).

Almost surely, 2^21774286290 is an apocalyptic number.

21774286290 is an abundant number, since it is smaller than the sum of its proper divisors (33558018990).

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

21774286290 is a wasteful number, since it uses less digits than its factorization.

21774286290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42694706.

The product of its (nonzero) digits is 677376, while the sum is 48.

The spelling of 21774286290 in words is "twenty-one billion, seven hundred seventy-four million, two hundred eighty-six thousand, two hundred ninety".