21227028246 has 24 divisors (see below), whose sum is σ = 46296482544. Its totient is φ = 7028816400.

The previous prime is 21227028227. The next prime is 21227028283. The reversal of 21227028246 is 64282072212.

It is a self number, because there is not a number n which added to its sum of digits gives 21227028246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3902181 + ... + 3907616.

It is an arithmetic number, because the mean of its divisors is an integer number (1929020106).

Almost surely, 2^21227028246 is an apocalyptic number.

21227028246 is an abundant number, since it is smaller than the sum of its proper divisors (25069454298).

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

21227028246 is a wasteful number, since it uses less digits than its factorization.

21227028246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7809956 (or 7809953 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The spelling of 21227028246 in words is "twenty-one billion, two hundred twenty-seven million, twenty-eight thousand, two hundred forty-six".