22220236500465 has 32 divisors (see below), whose sum is σ = 36525546089856. Its totient is φ = 11526619230720.

The previous prime is 22220236500463. The next prime is 22220236500487. The reversal of 22220236500465 is 56400563202222.

It is a happy number.

It is not a de Polignac number, because 22220236500465 - 2¹ = 22220236500463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22220236500463) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5088972 + ... + 8386781.

It is an arithmetic number, because the mean of its divisors is an integer number (1141423315308).

Almost surely, 2^{22220236500465} is an apocalyptic number.

It is an amenable number.

22220236500465 is a deficient number, since it is larger than the sum of its proper divisors (14305309589391).

22220236500465 is a wasteful number, since it uses less digits than its factorization.

22220236500465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13478769.

The product of its (nonzero) digits is 345600, while the sum is 39.

Adding to 22220236500465 its reverse (56400563202222), we get a palindrome (78620799702687).

The spelling of 22220236500465 in words is "twenty-two trillion, two hundred twenty billion, two hundred thirty-six million, five hundred thousand, four hundred sixty-five".