20226243961 has 27 divisors (see below), whose sum is σ = 25875901317. Its totient is φ = 15752176440.

The previous prime is 20226243959. The next prime is 20226243967. The reversal of 20226243961 is 16934262202.

The square root of 20226243961 is 142219.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 20226243961 - 2¹ = 20226243959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20226243961.

It is not an unprimeable number, because it can be changed into a prime (20226243967) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 10949940 + ... + 10951786.

Almost surely, 2^20226243961 is an apocalyptic number.

20226243961 is the 142219-th square number.

20226243961 is the 71110-th centered octagonal number.

It is an amenable number.

20226243961 is a deficient number, since it is larger than the sum of its proper divisors (5649657356).

20226243961 is an frugal number, since it uses more digits than its factorization.

20226243961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3730 (or 1865 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 20226243961 in words is "twenty billion, two hundred twenty-six million, two hundred forty-three thousand, nine hundred sixty-one".