20422278413 has 4 divisors (see below), whose sum is σ = 21126494940. Its totient is φ = 19718061888.

The previous prime is 20422278407. The next prime is 20422278469. The reversal of 20422278413 is 31487222402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15005760004 + 5416518409 = 122498^2 + 73597^2 .

It is a cyclic number.

It is not a de Polignac number, because 20422278413 - 2⁸ = 20422278157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20422278493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352108220 + ... + 352108277.

It is an arithmetic number, because the mean of its divisors is an integer number (5281623735).

Almost surely, 2^20422278413 is an apocalyptic number.

It is an amenable number.

20422278413 is a deficient number, since it is larger than the sum of its proper divisors (704216527).

20422278413 is an equidigital number, since it uses as much as digits as its factorization.

20422278413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704216526.

The product of its (nonzero) digits is 43008, while the sum is 35.

The spelling of 20422278413 in words is "twenty billion, four hundred twenty-two million, two hundred seventy-eight thousand, four hundred thirteen".