20345022562 has 4 divisors (see below), whose sum is σ = 30517533846. Its totient is φ = 10172511280.

The previous prime is 20345022557. The next prime is 20345022563. The reversal of 20345022562 is 26522054302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 26522054302 = 2 ⋅13261027151.

It can be written as a sum of positive squares in only one way, i.e., 20343031641 + 1990921 = 142629^2 + 1411^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20345022563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5086255639 + ... + 5086255642.

Almost surely, 2^20345022562 is an apocalyptic number.

20345022562 is a deficient number, since it is larger than the sum of its proper divisors (10172511284).

20345022562 is a wasteful number, since it uses less digits than its factorization.

20345022562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10172511283.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 20345022562 its reverse (26522054302), we get a palindrome (46867076864).

The spelling of 20345022562 in words is "twenty billion, three hundred forty-five million, twenty-two thousand, five hundred sixty-two".